> Randomness is hard. Yes. And might I say everything has a statistical bias. Picking people for an experiment is not like throwing dice Your sample will alwa

> Randomness is hard. Yes. And might I say everything has a statistical bias. Picking people for an experiment is not like throwing dice Your sample will always be biased, and it would be crazy to try and get a random sample from "the world". (and even then you have temporal bias - you can't run your experiments on people from the XIX century)