Trustworthiness can be causally overdetermined by multiple independent motivations.

Evidence

When I act in a way that seems to fit my interests, I might nevertheless assert that I am acting out of moral commitment, character, or something else. Moreover, I may be extremely good at acting in my interests and still be genuinely committed to the claim that my motivation is not that of self-interest. Given that more than one of these motivations—interests, morality, norms, identity—might govern my behavior, trustworthiness, and therefore trust, can be overdetermined. We often begin with a bit of risk taking that leads to simple trust as encapsulated interest, and then we develop such a rich relationship that other motivations come into play. I might also have normative commitments in some context that are quite independent of any grounding in interests, and I may have interests in that context as well, and either might be sufficient to motivate my trustworthiness. — Russell Hardin, Trust and Trustworthiness, 411

Categorization

• XREF: Explains how Saramago’s wife could act from both love (normative/identity) and rational interest in group survival, so the analytic distinction between motives collapses under empirical overdetermination. — connects to: Mature relationships make trust overdetermined by multiple independent motives; Actual trustworthiness combines motives that resist institutional mimicry; A trustworthy reputation can be exploited because it is imperfectly known (+1 more)
• corroborated: 2 independent passages support this claim — Russell Hardin, Trust and Trustworthiness, 411

Broader Connections

• Mature relationships make trust overdetermined by multiple independent motives #exemplifies (0.90)
• Actual trustworthiness combines motives that resist institutional mimicry #expands (0.85)