The run-length scale comes from a deterministic multiplication of speed and persistence time, not from a random walk or a cell-signaling model. The checked scale is still speed 4 times time 3 equals run 12 m exactly for the stated toy motion ledger; real cell tracks have stochastic reorientation, non-linear drag, boundary effects, and measurement uncertainty.
The training model uses a deterministic scale, not a simulated path. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
A persistence time is a scale
The checked claim is still speed 4 times time 3 equals run 12.
4⋅3=12
Do not infer a sampled path
The diagram gives one deterministic scale, not a random track or cell-signaling model.