Coherentism is the belief that all our beliefs are or could be reasons for our other beliefs. So there are no basic beliefs, like the foundationalists say. There's no objective point or points to which we could point and say "Those are the foundational beliefs. Those are the basic beliefs."
Take the example with the table like in the last post. For the belief "I see a brown table," I could give any number of other beliefs for why I believe that that belief is true. If so, there aren't any basic beliefs. By default, coherentism has to be right.
End of story there.