The Four Visions of Rationality

We have unbounded rationality, optimization under constraints and satisficing. And then fourthly, we have fast and frugal heuristics. Ged could you please take us through each of those visions of rationality? Yeah. I mean, the dominant vision is still optimization under constraints. So let's start with full rationality. You assume that people are like God and ask the question, how would they behave? That sounds kind of strange, but it's in a way a summary of how many models are being made today.