A liberal society stands on the proposition that we should all take seriously the idea that we might be wrong. That means we must place no one, including ourselves, beyond the reach of criticism (no final say); it means that we must allow people to err, even where the error offends and upsets, as it often will. But we also are not supposed to claim we have knowledge except where belief is checked by no one in particular (no personal authority). In other words, liberal science is built on two pillars. One is the right to offend in pursuit of truth. The other is the responsibility to check and
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