Brad DeLong writes: “A certain asymmetry here, by which, IMHO, you can tell the good guys who respect argument and evidence from the bad guys who do not…”
Then he goes on to show that Keynes and Paul Samuelson showed much more respect for Hayek’s contributions, than vice versa.
Using this criterion, we should look around at economists today, and judge their goodness by the sympathy and precision with which they treat their opponents.
For example, if someone summarized Hayek’s position by saying “Derp. No-class. Derp.” it would be a no-brainer. There are other examples I could give, but I want to leave a margin for subtlety.