@J12t

"[...] This implies that Texas and California trust each other. Doubtful."

there are different levels of trust. It all depends on your point of view. Within the US, sure you could say there is a low level of trust between both states. But if you compare this level of trust to some other foreign country, now somehow the trust level seems very high in comparison.

it's about "mostly" trusting each other. In that sense I think the definition is adequate.