Follow the steps exactly
A robot does not guess. It runs each step exactly, even if a box blocks the way.
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Five steps were written for an empty floor. Nobody tested them with a box in the way.
Step 1 of 4
- Five fixed steps, tested on an empty floor.
- Steps 1 and 2 succeed.
- Step 3 meets a box it never saw.
- The plan breaks right there, at step 3.
Run each step exactly as written. See where it breaks.
To trace a plan is to run each step by hand.