I am just starting to study philosophy and I am not understanding the claim that all knowlege comes from science. Could you please give me some practical examples?
The reason you feel you don't understand the claim is because it's nonsense. I know that there are three pillows on the bed behind me, but no science was committed in finding that out. I just turned around, looked and counted. I know that I had dinner with friends yesterday. No scienceing there either. I just remember. I know that one of our neighbors recently quit a committee he'd been a member of. Once again, no science; someone in a position to know told me. In fact, it's safe to say that by far most of what we know we know without anyone doing science. Of course people doing science make observations, consult their memories and get information from other people. But so does everyone, and most of us are not scientists and don't do science. The fact that X has important things in common with Y doesn't make X a Y.