Ideas that have gone past their expiration dates

a transcript of the latest Freakonomics podcast.. summary:

DUBNER:All right, we’ve already heard five ideas that should maybe be sent to the trash bin – the “atheism prerequisite” for scientists, the value of mouse models for human medicine (which, I admit, stunned me), the idea that statistics are as powerful and useful as we think; the idea of “the universe,” and the left-brain/right-brain construct. Coming up on Freakonomics Radio, some other ideas we might want to get rid of, including:
ALDA: The idea that things are either true or false.

DUBNER:And…

BLOOM: The idea that science can tell us everything we need to know about how to be happy.

DUBNER:And …

Michael NORTON: The idea that markets are good.

DUBNER: Really? You sure about that?

NORTON: And the second idea that I think is ready for retirement is the idea that markets are bad.