When the facts change, I change my mind. What do you do, sir?While we all know that we should avoid a policy without empirical fact, oftentimes the empirical findings at your disposal is at best inconclusive. Take for example the issue of death penalty's deterrence impact (HT: Andrew Leigh), or the economic impact of global warming.What would you do?
AP likes Alice and Cheshire Cat's dialogue:
"Would you tell me, please, which way I ought to go from here?"Which way, Mr Cat?
"That depends a good deal on where you want to get to," said the Cat.