Poker is a game of uncertainty.Our experiences shape our perceptions, which in turn shape our assumptions.There are two main parts to any poker decision: logic and assumptions. The logic of a good line is always the same - choose the optimal line with the highest +EV. And guesswork is what we think about our opponents' ranges.If people had agreed from the very beginning on certain initial assumptions, then they would all have arrived at one optimal line. However, to achieve this, players will need patience and calm communication.