This latter fact could not simply be a conjunctive fact, combining a finite number of facts about the whiteness of each individual swan. For even if a is white, and b is white, and c is white, and so on, for each individual swan, a, b, c, etc., it does not follow that all swans are white unless we are also given that a, b, c, etc. are all the swans there are; and this itself is a general fact. <Lowe, E. J., 2008, "Metaphysics", in The Routledge Companion to Twentieth Century Philosophy, p. 445>
Friendship, for example, is valuable in this way. For while friendship is undoubtedly useful, and therefore of instrumental value, one would be missing out on something important if one didn’t appreciate the fact that having friends is good for its own sake. Indeed, someone who only values their friends because it serves their wider interests arguably doesn’t have any real friends. <Pritchard, D., 2018, What is this thing called knowledge?, p. 10>
I have trouble comprehending these "for" in bold. I think these are conjunctions. However, as far as I know, unlike "because", "for" as a conjunction is not placed at the beginning of a sentence. How should I get it?