Multiply Along the Chain
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State
A multi-step task succeeds only if every step succeeds — and per-step reliabilities multiply along the chain, so small per-step losses compound into large whole-task failure.
Show
Unit 6's along-a-branch rule, pointed at autonomy: the honest unit of evaluation is the whole chain, never the dazzling step.
Watch for
Per-step brilliance is not chain reliability — the arithmetic will not be charmed.