One page. One instrument.

The Decision Trail

When the reasoning happens inside a model and only the output survives, you keep the answer and lose the argument. The repair is not to use the machine less. It is to externalise the reasoning, not just the output.

This is the instrument for doing that. One material decision, three lines, written in your own words, in a place the model cannot see.

• The load-bearing assumption, the one that carries the weight
• The alternatives you rejected, and why each lost
• The one fact that would flip the call

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