Coverage, protected traits, disparate treatment, harassment, disparate impact, retaliation, mixed motives, defenses, burdens, records, Ricci, and explanatory proof traces.

Structured Visual

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

Discrimination: Title VII, ADEA, and Proof Structures: selected questionsSelected questionsCoverage and claimDisparate treatmentMcDonnell Douglas pending
highlighted = computed this step

Scope and honesty note

Jurisdiction: United States federal employment-law overview with Texas program records used where pinned; as of 2026-08-29. Coverage, worker status, workplaces, jurisdictions, facts, bargaining agreements, remedies, deadlines, benefits, leave, accommodations, safety, compensation and unemployment programs vary. Synthetic facts are classroom inputs, not legal, employment, wage, discrimination, accommodation, leave, safety, benefits, claim, appeal or strategy advice. The model cannot classify a real worker, calculate wages owed, determine protected status, liability, accommodation, leave, injury coverage, benefit eligibility, fraud, overpayment, privacy rights, discipline, discharge or outcome. Cite, expose gaps, abstain, and hand off.

employment-law model as of 2026−08−29\text{employment-law model as of }2026-08-29

See the essential structure first

Start with this deliberately incomplete structure, then use the pinned authorities, worked application, exceptions, and handoff below. This deliberately incomplete preview has 4 nodes; exceptions and legal consequences remain in the sourced prose below.

glance nodes=4\text{glance nodes}=4

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

Discrimination: Title VII, ADEA, and Proof Structures: selected questionsSelected questionsCoverage and claimDisparate treatmentMcDonnell Douglas pending

Begin with employment doctrine

Title VII makes specified employment practices unlawful because of race, color, religion, sex, or national origin and separately regulates disparate impact. Disparate treatment concerns intentional differential action; disparate impact concerns a specific facially neutral practice causing prohibited effects, with job-relatedness, business necessity, and less-discriminatory-alternative branches. McDonnell Douglas burden shifting remains explanatory pending ingest and is a method of proof, not the substantive elements of every case. Ricci held that discarding test results because of race was disparate treatment and adopted a strong-basis-in-evidence threshold for the asserted need to avoid disparate-impact liability; Title VII protects individuals of every race, including the white and Hispanic firefighters there. ADEA and ADA claims use distinct text and causation rules.

coverage, status, elements, defense, remedy\text{coverage, status, elements, defense, remedy}

Title VII operative prohibition

The newly landed statute pins employer, agency, labor-organization, training, testing, disparate-impact and other unlawful-practice provisions. Verbatim source text: “§2000e–2. Unlawful employment practices (a) Employer practices It shall be an unlawful employment practice for an employer- (1) to fail or refuse to hire or to discharge any individual, or otherwise to discriminate against any individual with respect to his compensation, terms, conditions, or privileges of employment, because of such individual's race, color, religion, sex, or national origin; or (2) to limit, segregate, or classify his employees or applicants for employment in any way which would deprive or tend to deprive any individual of employment opportunities or otherwise adversely affect his status as an employee, because of such individual's race, color, religion, sex, or national origin. (b) Employment agency practices It shall be an unlawful employment practice for an employment agency to fail or refuse to refer for employment, or otherwise to discriminate against, any individual because of his race, color, religion, sex, or national origin, or to classify or refer for employment any individual on the basis of his race, color, religion, sex, or national origin. (c) Labor organization practices It shall be an unlawful employment practice for a labor organization- (1) to exclude or to expel from its membership, or otherwise to discriminate against, any individual because of his race, color, religion, sex, or national origin; (2) to limit, segregate, or classify its membership or applicants for membership, or to classify or fail or refuse to refer for employment any individual, in any way which would deprive or tend to deprive any individual of employment opportunities, or would limit such employment opportunities or otherwise adversely affect his status as an employee or as an applicant for employment, because of such individual's race, color, religion, sex, or national origin; or (3) to cause or attempt to cause an employer to discriminate against an individual in violation of this section. (d) Training programs It shall be an unlawful employment practice for any employer, labor organization, or joint labor-management committee controlling apprenticeship or other training or retraining, including on-the-job training programs to discriminate against any individual because of his race, color, religion, sex, or national origin in admission to, or employment in, any program established to provide apprenticeship or other training. (e) Businesses or enterprises with personnel qualified on basis of religion, sex, or national origin; educational institutions with personnel of particular religion Notwithstanding any other provision of this subchapter, (1) it shall not be an unlawful employment practice for an employer to hire and employ employees, for an employment agency to classify, or refer for employment any individual, for a labor organization to classify its membership or to classify or refer for employment any individual, or for an employer, labor organization, or joint labor-management committee controlling apprenticeship or other training or retraining programs to admit or employ any individual in any such program, on the basis of his religion, sex, or national origin in those certain instances where religion, sex, or national origin is a bona fide occupational qualification reasonably necessary to the normal operation of that particular business or enterprise, and (2) it shall not be an unlawful employment practice for a school, college, university, or other educational institution or institution of learning to hire and employ employees of a particular religion if such school, college, university, or other educational institution or institution of learning is, in whole or in substantial part, owned, supported, controlled, or managed by a particular religion or by a particular religious corporation, association, or society, or if the curriculum of such school, college, university, or other educational institution or institution of learning is directed toward the propagation of a particular religion. (f) Members of Communist Party or Communist-action or Communist-front organizations As used in this subchapter, the phrase "unlawful employment practice" shall not be deemed to include any action or measure taken by an employer, labor organization, joint labor-management committee, or employment agency with respect to an individual who is a member of the Communist Party of the United States or of any other organization required to register as a Communist-action or Communist-front organization by final order of the Subversive Activities Control Board pursuant to the Subversive Activities Control Act of 1950 [50 U.S.C. 781 et seq.]. (g) National security Notwithstanding any other provision of this subchapter, it shall not be an unlawful employment practice for an employer to fail or refuse to hire and employ any individual for any position, for an employer to discharge any individual from any position, or for an employment agency to fail or refuse to refer any individual for employment in any position, or for a labor organization to fail or refuse to refer any individual for employment in any position, if- (1) the occupancy of such position, or access to the premises in or upon which any part of the duties of such position is performed or is to be performed, is subject to any requirement imposed in the interest of the national security of the United States under any security program in effect pursuant to or administered under any statute of the United States or any Executive order of the President; and (2) such individual has not fulfilled or has ceased to fulfill that requirement. (h) Seniority or merit system; quantity or quality of production; ability tests; compensation based on sex and authorized by minimum wage provisions Notwithstanding any other provision of this subchapter, it shall not be an unlawful employment practice for an employer to apply different standards of compensation, or different terms, conditions, or privileges of employment pursuant to a bona fide seniority or merit system, or a system which measures earnings by quantity or quality of production or to employees who work in different locations, provided that such differences are not the result of an intention to discriminate because of race, color, religion, sex, or national origin, nor shall it be an unlawful employment practice for an employer to give and to act upon the results of any professionally developed ability test provided that such test, its administration or action upon the results is not designed, intended or used to discriminate because of race, color, religion, sex or national origin. It shall not be an unlawful employment practice under this subchapter for any employer to differentiate upon the basis of sex in determining the amount of the wages or compensation paid or to be paid to employees of such employer if such differentiation is authorized by the provisions of section 206(d) of title 29. (i) Businesses or enterprises extending preferential treatment to Indians Nothing contained in this subchapter shall apply to any business or enterprise on or near an Indian reservation with respect to any publicly announced employment practice of such business or enterprise under which a preferential treatment is given to any individual because he is an Indian living on or near a reservation. (j) Preferential treatment not to be granted on account of existing number or percentage imbalance Nothing contained in this subchapter shall be interpreted to require any employer, employment agency, labor organization, or joint labor-management committee subject to this subchapter to grant preferential treatment to any individual or to any group because of the race, color, religion, sex, or national origin of such individual or group on account of an imbalance which may exist with respect to the total number or percentage of persons of any race, color, religion, sex, or national origin employed by any employer, referred or classified for employment by any employment agency or labor organization, admitted to membership or classified by any labor organization, or admitted to, or employed in, any apprenticeship or other training program, in comparison with the total number or percentage of persons of such race, color, religion, sex, or national origin in any community, State, section, or other area, or in the available work force in any community, State, section, or other area. (k) Burden of proof in disparate impact cases (1)(A) An unlawful employment practice based on disparate impact is established under this subchapter only if- (i) a complaining party demonstrates that a respondent uses a particular employment practice that causes a disparate impact on the basis of race, color, religion, sex, or national origin and the respondent fails to demonstrate that the challenged practice is job related for the position in question and consistent with business necessity; or (ii) the complaining party makes the demonstration described in subparagraph (C) with respect to an alternative employment practice and the respondent refuses to adopt such alternative employment practice. (B)(i) With respect to demonstrating that a particular employment practice causes a disparate impact as described in subparagraph (A)(i), the complaining party shall demonstrate that each particular challenged employment practice causes a disparate impact, except that if the complaining party can demonstrate to the court that the elements of a respondent's decisionmaking process are not capable of separation for analysis, the decisionmaking process may be analyzed as one employment practice. (ii) If the respondent demonstrates that a specific employment practice does not cause the disparate impact, the respondent shall not be required to demonstrate that such practice is required by business necessity. (C) The demonstration referred to by subparagraph (A)(ii) shall be in accordance with the law as it existed on June 4, 1989, with respect to the concept of "alternative employment practice". (2) A demonstration that an employment practice is required by business necessity may not be used as a defense against a claim of intentional discrimination under this subchapter. (3) Notwithstanding any other provision of this subchapter, a rule barring the employment of an individual who currently and knowingly uses or possesses a controlled substance, as defined in schedules I and II of section 102(6) of the Controlled Substances Act (21 U.S.C. 802(6)), other than the use or possession of a drug taken under the supervision of a licensed health care professional, or any other use or possession authorized by the Controlled Substances Act [21 U.S.C. 801 et seq.] or any other provision of Federal law, shall be considered an unlawful employment practice under this subchapter only if such rule is adopted or applied with an intent to discriminate because of race, color, religion, sex, or national origin. (l) Prohibition of discriminatory use of test scores It shall be an unlawful employment practice for a respondent, in connection with the selection or referral of applicants or candidates for employment or promotion, to adjust the scores of, use different cutoff scores for, or otherwise alter the results of, employment related tests on the basis of race, color, religion, sex, or national origin. (m) Impermissible consideration of race, color, religion, sex, or national origin in employment practices Except as otherwise provided in this subchapter, an unlawful employment practice is established when the complaining party demonstrates that race, color, religion, sex, or national origin was a motivating factor for any employment practice, even though other factors also motivated the practice. (n) Resolution of challenges to employment practices implementing litigated or consent judgments or orders (1)(A) Notwithstanding any other provision of law, and except as provided in paragraph (2), an employment practice that implements and is within the scope of a litigated or consent judgment or order that resolves a claim of employment discrimination under the Constitution or Federal civil rights laws may not be challenged under the circumstances described in subparagraph (B). (B) A practice described in subparagraph (A) may not be challenged in a claim under the Constitution or Federal civil rights laws- (i) by a person who, prior to the entry of the judgment or order described in subparagraph (A), had- (I) actual notice of the proposed judgment or order sufficient to apprise such person that such judgment or order might adversely affect the interests and legal rights of such person and that an opportunity was available to present objections to such judgment or order by a future date certain; and (II) a reasonable opportunity to present objections to such judgment or order; or (ii) by a person whose interests were adequately represented by another person who had previously challenged the judgment or order on the same legal grounds and with a similar factual situation, unless there has been an intervening change in law or fact. (2) Nothing in this subsection shall be construed to- (A) alter the standards for intervention under rule 24 of the Federal Rules of Civil Procedure or apply to the rights of parties who have successfully intervened pursuant to such rule in the proceeding in which the parties intervened; (B) apply to the rights of parties to the action in which a litigated or consent judgment or order was entered, or of members of a class represented or sought to be represented in such action, or of members of a group on whose behalf relief was sought in such action by the Federal Government; (C) prevent challenges to a litigated or consent judgment or order on the ground that such judgment or order was obtained through collusion or fraud, or is transparently invalid or was entered by a court lacking subject matter jurisdiction; or (D) authorize or permit the denial to any person of the due process of law required by the Constitution. (3) Any action not precluded under this subsection that challenges an employment consent judgment or order described in paragraph (1) shall be brought in the court, and if possible before the judge, that entered such judgment or order. Nothing in this subsection shall preclude a transfer of such action pursuant to section 1404 of title 28. ( Pub. L. 88–352, title VII, §703, July 2, 1964, 78 Stat. 255 ; Pub. L. 92–261, §8(a), (b), Mar. 24, 1972, 86 Stat. 109 ; Pub. L. 102–166, title I, §§105(a), 106, 107(a), 108, Nov. 21, 1991, 105 Stat. 1074–1076 .)” Source: 42 U.S.C. § 2000e-2; https://www.neochart.com/catalog/federal/civil_rights/title_42/chapter_21/section_2000e_2/title42_sec2000e_2_08de5bfae7d0/2000e_2_unlawful_employment_practices_0001/index.html; data via neochart.com, snapshot 2026-08.

pinned authority: 42U.S.C.§2000e−2\text{pinned authority: }42 U.S.C. § 2000e-2

Ricci reconciliation holding

The bounded paragraph pins the strong-basis-in-evidence rule for intentional race-conscious action asserted to avoid disparate-impact liability. Verbatim source text: “Title VII does not prohibit an employer from considering, before administering a test or practice, how to design that test or practice in order to provide a fair opportunity for all individuals, regardless of their race. And when, during the test-design stage, an employer invites comments to ensure the test is fair, that process can provide a common ground for open discussions toward that end. We hold only that, under Title VII, before an employer can engage in intentional discrimination for the asserted purpose of avoiding or remedying an unintentional disparate impact, the employer must have a strong basis in evidence to believe it will be subject to disparate-impact liability if it fails to take the race-conscious, discriminatory action.” Source: Ricci v. DeStefano, 557 U.S. 557, 585 (2009); https://www.neochart.com/catalog/cases/us/volume_557/0557_01/index.html; data via neochart.com, snapshot 2026-08.

pinned authority: Ricciv.DeStefano,557U.S.557,585(2009)\text{pinned authority: }Ricci v. DeStefano, 557 U.S. 557, 585 (2009)

Disability-law contrast

The ADA provision shows that disability discrimination and accommodation use a distinct statutory system rather than Title VII trait substitution. Verbatim source text: “§12112. Discrimination (a) General rule No covered entity shall discriminate against a qualified individual on the basis of disability in regard to job application procedures, the hiring, advancement, or discharge of employees, employee compensation, job training, and other terms, conditions, and privileges of employment. (b) Construction As used in subsection (a), the term "discriminate against a qualified individual on the basis of disability" includes- (1) limiting, segregating, or classifying a job applicant or employee in a way that adversely affects the opportunities or status of such applicant or employee because of the disability of such applicant or employee; (2) participating in a contractual or other arrangement or relationship that has the effect of subjecting a covered entity's qualified applicant or employee with a disability to the discrimination prohibited by this subchapter (such relationship includes a relationship with an employment or referral agency, labor union, an organization providing fringe benefits to an employee of the covered entity, or an organization providing training and apprenticeship programs); (3) utilizing standards, criteria, or methods of administration- (A) that have the effect of discrimination on the basis of disability; or (B) that perpetuate the discrimination of others who are subject to common administrative control; (4) excluding or otherwise denying equal jobs or benefits to a qualified individual because of the known disability of an individual with whom the qualified individual is known to have a relationship or association; (5)(A) not making reasonable accommodations to the known physical or mental limitations of an otherwise qualified individual with a disability who is an applicant or employee, unless such covered entity can demonstrate that the accommodation would impose an undue hardship on the operation of the business of such covered entity; or (B) denying employment opportunities to a job applicant or employee who is an otherwise qualified individual with a disability, if such denial is based on the need of such covered entity to make reasonable accommodation to the physical or mental impairments of the employee or applicant; (6) using qualification standards, employment tests or other selection criteria that screen out or tend to screen out an individual with a disability or a class of individuals with disabilities unless the standard, test or other selection criteria, as used by the covered entity, is shown to be job-related for the position in question and is consistent with business necessity; and (7) failing to select and administer tests concerning employment in the most effective manner to ensure that, when such test is administered to a job applicant or employee who has a disability that impairs sensory, manual, or speaking skills, such test results accurately reflect the skills, aptitude, or whatever other factor of such applicant or employee that such test purports to measure, rather than reflecting the impaired sensory, manual, or speaking skills of such employee or applicant (except where such skills are the factors that the test purports to measure). (c) Covered entities in foreign countries (1) In general It shall not be unlawful under this section for a covered entity to take any action that constitutes discrimination under this section with respect to an employee in a workplace in a foreign country if compliance with this section would cause such covered entity to violate the law of the foreign country in which such workplace is located. (2) Control of corporation (A) Presumption If an employer controls a corporation whose place of incorporation is a foreign country, any practice that constitutes discrimination under this section and is engaged in by such corporation shall be presumed to be engaged in by such employer. (B) Exception This section shall not apply with respect to the foreign operations of an employer that is a foreign person not controlled by an American employer. (C) Determination For purposes of this paragraph, the determination of whether an employer controls a corporation shall be based on- (i) the interrelation of operations; (ii) the common management; (iii) the centralized control of labor relations; and (iv) the common ownership or financial control, of the employer and the corporation. (d) Medical examinations and inquiries (1) In general The prohibition against discrimination as referred to in subsection (a) shall include medical examinations and inquiries. (2) Preemployment (A) Prohibited examination or inquiry Except as provided in paragraph (3), a covered entity shall not conduct a medical examination or make inquiries of a job applicant as to whether such applicant is an individual with a disability or as to the nature or severity of such disability. (B) Acceptable inquiry A covered entity may make preemployment inquiries into the ability of an applicant to perform job-related functions. (3) Employment entrance examination A covered entity may require a medical examination after an offer of employment has been made to a job applicant and prior to the commencement of the employment duties of such applicant, and may condition an offer of employment on the results of such examination, if- (A) all entering employees are subjected to such an examination regardless of disability; (B) information obtained regarding the medical condition or history of the applicant is collected and maintained on separate forms and in separate medical files and is treated as a confidential medical record, except that- (i) supervisors and managers may be informed regarding necessary restrictions on the work or duties of the employee and necessary accommodations; (ii) first aid and safety personnel may be informed, when appropriate, if the disability might require emergency treatment; and (iii) government officials investigating compliance with this chapter shall be provided relevant information on request; and (C) the results of such examination are used only in accordance with this subchapter. (4) Examination and inquiry (A) Prohibited examinations and inquiries A covered entity shall not require a medical examination and shall not make inquiries of an employee as to whether such employee is an individual with a disability or as to the nature or severity of the disability, unless such examination or inquiry is shown to be job-related and consistent with business necessity. (B) Acceptable examinations and inquiries A covered entity may conduct voluntary medical examinations, including voluntary medical histories, which are part of an employee health program available to employees at that work site. A covered entity may make inquiries into the ability of an employee to perform job-related functions. (C) Requirement Information obtained under subparagraph (B) regarding the medical condition or history of any employee are subject to the requirements of subparagraphs (B) and (C) of paragraph (3). ( Pub. L. 101–336, title I, §102, July 26, 1990, 104 Stat. 331 ; Pub. L. 102–166, title I, §109(b)(2), Nov. 21, 1991, 105 Stat. 1077 ; Pub. L. 110–325, §5(a), Sept. 25, 2008, 122 Stat. 3557 .)” Source: 42 U.S.C. § 12112; https://www.neochart.com/catalog/federal/civil_rights/title_42/chapter_126/section_12112/title42_sec12112_ee69fb3f451d/12112_discrimination_0001/index.html; data via neochart.com, snapshot 2026-08.

pinned authority: 42U.S.C.§12112\text{pinned authority: }42 U.S.C. § 12112

Pin the synthetic employment record

A synthetic discrimination packet records coverage, actor, person, trait, age, disability coordinate, application, qualification, comparator, test score, practice, selection data, statements, reason, documentation, protected activity, timing, statistical method, validation evidence, business necessity, alternatives, harassment events, response, burden stage, uncertainty and review.

stated work events, not legal conclusions\text{stated work events, not legal conclusions}

Work the employment application

The promotion-test decision is classified first as express race-based treatment, not excused merely by a good-faith fear of disparate impact. The employer's disparate-impact concern enters Ricci's strong-basis-in-evidence trace, including job relatedness, business necessity and available alternatives. A separate individual decision uses direct or circumstantial proof; McDonnell Douglas stages are labeled explanatory and do not replace the statutory because-of inquiry. No statistic or burden-stage completion yields liability.

classify, compute stated arithmetic, abstain, hand off\text{classify, compute stated arithmetic, abstain, hand off}

Read the populated employment record

The discrimination record contains statute, coverage, actor, person, protected trait, age, disability coordinate, employment action, qualification, comparator, statement, sequence, stated reason, pretext evidence, practice, applicant pool, selection count, rate, disparity, causation, validation, business necessity, alternative, refusal, harassment event, severity field, notice, response, protected activity, retaliation timing, proof stage, Ricci threshold, remedy, gap, and reviewer. The artifact contains 18 populated rows.

rows=18\text{rows}=18

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

Discrimination: Title VII, ADEA, and Proof Structures: Pinned authoritiesPinned authoritiesVerbatim statute or bounded…42 U.S.C. § 2000e-2: Title VII operative prohibitionThe newly landed statute…Ricci v. DeStefano, 557 U.S. 557, 585 (2009): Ricci reconciliation holdingThe bounded paragraph pins…42 U.S.C. § 12112: Disability-law contrastThe ADA provision shows…
Discrimination: Title VII, ADEA, and Proof Structures: Synthetic employment recordSynthetic employment recordClassroom events, not liability…Selection processEmployer administers promotion test,…Individual eventApplicant or employee has…Practice dataSpecific employment practice, applicant…
Discrimination: Title VII, ADEA, and Proof Structures: Employment trace part 1Employment traceCoverage, status, elements, defenses,…Coverage and claimStatute, employer or other…Disparate treatmentProtected trait, adverse or…McDonnell Douglas pendingThe canonical case is…
Discrimination: Title VII, ADEA, and Proof Structures: Employment trace part 2Employment traceCoverage, status, elements, defenses,…HarassmentProtected basis, unwelcome conduct,…Disparate impactSpecific facially neutral practice,…RicciRace-based discarding of results…
Discrimination: Title VII, ADEA, and Proof Structures: Employment trace part 3Employment traceCoverage, status, elements, defenses,…ADEA and other lawsAge forty-plus coverage and…BoundaryStatistics, comparator matches and…

Read the complete record

The complete record keeps sources, stated facts, and questions for review separate. Pinned authorities: Verbatim statute or bounded case excerpt. 42 U.S.C. § 2000e-2: Title VII operative prohibition: The newly landed statute pins employer, agency, labor-organization, training, testing, disparate-impact and other unlawful-practice provisions.. Ricci v. DeStefano, 557 U.S. 557, 585 (2009): Ricci reconciliation holding: The bounded paragraph pins the strong-basis-in-evidence rule for intentional race-conscious action asserted to avoid disparate-impact liability.. 42 U.S.C. § 12112: Disability-law contrast: The ADA provision shows that disability discrimination and accommodation use a distinct statutory system rather than Title VII trait substitution.. Synthetic employment record: Classroom events, not liability or eligibility conclusions. Selection process: Employer administers promotion test, observes racial score disparity, discards results, and records asserted concern about disparate-impact liability. Individual event: Applicant or employee has qualification, application, interview, score, comparator, statement, decision, reason, protected activity and timing records. Practice data: Specific employment practice, applicant pool, selected group, comparison group, selection rates, validation study, business-necessity evidence and alternatives. Employment trace: Coverage, status, elements, defenses, computation, process and handoff. Coverage and claim: Statute, employer or other covered actor, employee or applicant, timely process, challenged employment action and remedy source. Disparate treatment: Protected trait, adverse or differential action, because-of causation under governing provision, comparators, statements, sequence, stated reason, pretext evidence and mixed-motive rule. McDonnell Douglas pending: The canonical case is absent locally; burden shifting is explanatory: prima facie inference, employer production of legitimate nondiscriminatory reason, and plaintiff proof of pretext; not claim elements or pinned authority. Harassment: Protected basis, unwelcome conduct, severity or pervasiveness or applicable standard, work environment, employer responsibility, notice and response. Disparate impact: Specific facially neutral practice, statistical disparity, causation, job relatedness and business necessity, equally effective less discriminatory alternative and refusal. Ricci: Race-based discarding of results was disparate treatment; avoiding disparate impact justified intentional discrimination only with the Court's strong-basis-in-evidence threshold in that reconciliation context. ADEA and other laws: Age forty-plus coverage and but-for causation under ADEA doctrine, state-law variants, Equal Pay Act, section Nineteen-Eighty-One, retaliation and remedies remain separate. Boundary: Statistics, comparator matches and burden stages organize evidence but do not compute discrimination, intent, causation, business necessity or liability.

sources, stated facts, and open questions\text{sources, stated facts, and open questions}

Narrow summary

Separate treatment from impact, use proof frameworks without turning them into elements or scores, apply Ricci narrowly, and keep ADEA and ADA on their own statutory paths.

cite, preserve worker dignity, abstain, hand off\text{cite, preserve worker dignity, abstain, hand off}