Should philosophers know any and every branch of science?

I would be charitable and say, vaguely, most. They do want to discuss ideas that are discussed by philosophers.

The category of poster I am least charitable with is the ‘voice of reason and science’ poster who doesn’t really know any philosophy, certainly not any epistemology or philosophy of science, has little idea of how one justifies an assertion, is content with fallacies strewn in their own posts as they deride whomever they consider barbarians, such as Chrisitans, New Agers, alternative medicine people, conspiracy theorists, spiritual people. Dawkins is a famous example of the type.

What didn’t your teacher know about you? them?

Yes.

Well, he did perhaps not know for example what kind of life I prefered to lead at that time. If he had known that, then he would not have called me „Humboldt“, or he would not have known the lifestyle of the noble (aristocratic) von Humboldt brothers. :wink: