Speaking of optimism/pessimism, that challenge was never very satisfactory. It's not easy thinking of a challenge that could be solved one way with optimism, and another way with pessimism. The logic was since the moving block course was fairly difficult, the player would need to be optimistic to keep trying until they prevail. Taking the shortcut, then, would suggest the player doesn't have that faith in themselves, and so would be pessimistic.
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