Try hard to know the opponents cards or guess if you can, for so little is governed by any logical or predictable knowledge base. In no more than the simplest of a transaction, would logic, intellectual argument be the cornerstone of an agreement. All that goes into the mix that defines a deal, is everything about situational, logistical and above all a whimsical sense of reality (of the decision maker). How far the whimsical reasons are cloaked is an art the best of manager’s practice and at the highest level euphemistically calls it “intuition”.
But rarely has anyone won a game of poker with any sense of logical game plan. It is a gamble with a good grasp of cards, its permutations and the psyche of the players and to that extent reasoning needs to be used but no more.