david hume calls this is the moral science. i see the stuff we talk about at freedom fest is a form of moral or social science. >> you write the process of critical feedback is the life blood of science as is the willingness however begrudgingly to say i was wrong. >> most of us are wrong about many of the things we believe. the only way to find out if you are wrong is to engage with other people particularly other knowledgeable people. particularly knowledgeable people that disagree with you because that is the only way to find out. if you are in the echo chamber, the bubble, and surround yourself with people that only believe you believe. if you only read newspapers that already believe what you read. if you are conservative you read "the wall street journal." that is final but pick up another paper every once in a while. read an -- if you can't defend your position against critics how strong is your position to begin with? it is a way of testing your only beliefs. it is always possible you might be wrong. science depends on