Are you prescribing a rational method of decision making or are you describing actual behavior (possibly not rational)?

Although Vaniver punted this by saying that you shouldn't judge ultimate values on rationality, you're right that this describes behaviour (and not values directly), and inferring values from behaviour assumes rationality.

However … it's intuitively obvious to me that it's perfectly rational to (in some circumstances) to go the store and get some cake when all that you have at home is chicken, even though leaving the house increases your risk of death (car crash etc). I assumed that this is the sort of behaviour that Vaniver was referring to; do you agree that it's rational (and so we can infer values in line with the axiom of equivalence)?