The bottom line is that all of us – conservative and liberal, believer and atheist – live in the same real world, whether we like it or not. Public policy must be based on the best available evidence about that world. In a free society each person has the right to believe whatever nonsense he wishes, but the rest of us should pay attention only to those opinions that are based on evidence. (“Taking Evidence Seriously,” Comment is Free)
But you knew that already.