The Policy
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A plan under uncertainty is a policy — a decision prepared for every situation — solved backward: decisions take the best branch, chance takes the weighted average.
Show
The striped game tree returns with one stripe recolored: where MIN chose the worst for you, chance now averages.
Watch for
The answer to a sequential problem is never one move; it is a decision for every branch.