The trusted party performs cooperative action, not the truster

Evidence

If A trusts B to take some future action C, then at one simple level it is A who is trusting B, in that the satisfaction of A’s goal requires B to do C, and not something else which would be detrimental to A’s interests. As such, it is not A who is being cooperative, but B in performing the action C, and by the same token B is not displaying trust in A. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 532

Categorization

• XREF: Inverts the commonsense framing and feeds the reader’s claim that trust requires observable constraint on B; the doctor’s wife’s continued sight makes her the only A whose trusting exposure is bearable.
• DEFINE: Pinpoints which party in a trust relationship carries the cooperative burden.