I was raised in an Orthodox Jewish household and I wouldn't say so much it's informed my views, but it's informed my interest, so I think as a child I was often very baffled by knowledge claims.

So dogma, doctrine, unexamined assumptions, that's what it is to be sharing that, the hippies shadow, no way of grounding it to reality. It's where we're just cut off from reality unless we can argue, we can substantiate, we can justify, we can convince each other.

One of the peculiar features of philosophical questions is how eager people are to offer solutions that miss the point of the questions. Sometimes these failed solutions are scientific, and sometimes they are religious, and sometimes they are based on what is called plain common sense.

We need science. We need empirical evidence. We can't just use mathematical reasoning to deduce the nature of the world.

When you ask why did some particular question occur to a scientist or philosopher for the first time, or why did this particular approach seem natural, then your questions concern the context of discovery. When you ask whether the argument the philosopher puts forth to answer that question is sound, or whether the evidence justifies the scientific theory proposed, then you've entered the context of justification. Considerations of history, sociology, anthropology, and psychology are relevant to the context of discovery, but not to justification.

It's very important to remember that the philosophers were social dissidents. They were social critics. The man in the street or woman in the street did not particularly cherish what they said. Socrates was killed.

When the first people started to argue against slavery, for example, this was a new idea. If you crowd-source, you'd never come up with this. And so the - exactly the kind of progress we've made couldn't be made if we depend it on crowd-sourcing.