"Ignorance is a prerequisite for disagreement if you assume entirely rational decision-making." You'd also have to be profoundly naive to ever assume entirely

"Ignorance is a prerequisite for disagreement if you assume entirely rational decision-making." You'd also have to be profoundly naive to ever assume entirely rational decision-making out of humans, though I get the sense that a number of those words must mean very different things to you than they do to most.