You can find the answers to your questions, & even some you didn't ask, by starting here:
That's one you should probably bookmark because you'll want to be referring to it
frequently. You would do well to read that entire thread, if not right now in one
sitting, eventually over time. For the present question, do a search for the text
"philosophy" within that web page. That will reposition the page to a reference that
contains a link. Click the link & read what you find. If you've still got questions,
come back & ask them. But before you do, there's another text string you should look for
in that thread. Your search string is "stealth quote" this time.