Laboratory / Computing
Procedures and state
Step through a small Python trace one expression at a time. Predict the next state before revealing it, then change the input list and identify which instructions remain invariant.
What changed
The trace exposes 4 state transitions. The highlighted instruction is where the next binding changes.
Return to the route
Experiment after prediction.
Before changing a control, say which visible feature should move and which should remain invariant. That prediction is the useful part of the experiment; motion alone is not evidence.