The Complexity–Coherence Trade-Off in Cognition

I present evidence for a systematic complexity–coherence trade-off in cognition. I show how feasible strategies for increasing cognitive complexity along three dimensions come at the expense of a heightened vulnerability to incoherence. I discuss two normative implications of the complexity–coherence trade-off: a novel challenge to coherence-based theories of bounded rationality and a new strategy for vindicating the rationality of seemingly irrational cognitions. I also discuss how the complexity–coherence trade-off sharpens recent descriptive challenges to dual process theories of cognition.