I'm trying to get a grasp on coherentism and what is proposes is the epistemological justification for knowledge. From what I've taken so far, coherentism relies on what is commonly referred to as "circular reasoning" in that knowledge B could be the justification for knowledge A, and knowledge C could be the justification for knowledge B, and knowledge A could be the justification for knowledge C. However, it shouldn't be referred to negatively as circular reasoning because we are wrong to presuppose that reasoning should be linear.
If I have this right so far, I'm understanding it, in theory at least. However, the question still remains for me. How do we gain that first piece of knowledge? Do we simply start with beliefs instead of knowledge, and those beliefs lead us to form knowledge about new things which in turn justifies our beliefs and makes our first belief knowledge?
Sorry if that sounds like a mouth full, but I'm having a hard time finding exactly what a coherentist would give as justification for the first piece of knowledge that one encounters in their life. If there is no formal response, would they say that pure or impure justification is not possible but that their system can explain the "bigger picture"?
Sorry if that seems like a lot of questions, I was really only trying to ask one, but was just trying to clarify. To sum it up: assuming that my understanding is correct, how does the purported system of justification explain the originating source of knowledge?