Three threshold rows show negative, zero, and positive energy margin against the same required energy.
Below, equal, and above threshold rows show the inclusive energy gate. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Negative margin rejects
Available energy 180 J minus required 200 J gives margin -20 J and accepted bit 0.
180−200=−20,a=0
Zero margin passes exactly at threshold
Available energy 200 J minus required 200 J gives margin 0 J and accepted bit 1.
200−200=0,a=1
Positive margin also passes
Available energy 260 J minus required 200 J gives margin 60 J and accepted bit 1.