The freedom of others, however, is not by itself sufficient to characterize the conditions in which the issue of trust arises. Our relationship with people who are to some extent free must itself be one of limited freedom. It is a freedom in the sense that we have to have a choice as to whether we should enter into or maintain a potentially risky relationship: it must be possible for us to refrain from action. If it were only others who enjoyed freedom, while we had no alternative but to depend on them, then for us the problem of trust would not arise: we would hope rather than trust

DEFINE: Clarifies that trust presupposes mutual limited freedom — the option to refrain, otherwise one hopes rather than trusts.

Diego Gambetta, Trust - Making and Breaking…, loc. 2727