On the contrary, a true "monochotomy". He definitely didn't get anything from God, or from sky Jesus, or from beings in the third heaven. Whether he thought he did or not, in factual reality he didn't. Therefore he got it from some human source. Whether that source consisted of Jesus' relatives and friends or not, that is where he got it. And it may not have been JC information, of which he possessed very little, as far as we can see; but the source of his beliefs, whether these were based on fact or not.
I think there probably was a Jesus but even if there was not any Jesus I think Paul was dependent for his beliefs on people who claimed to be "disciples" and "brothers" of Jesus, and to be in command of "myriads" of supporters.
It seems to me that the most plausible reason why these people believed in a Jesus is that there was one; but even if here was not, that is the source to which Paul is at least partly indebted.
If anyone misrepresents my views again, I will refer them by number to this post, and to the previous one.
ETA I just noticed that IanS has done exactly that. No it wasn't, you naughty chap. Consider yourself referred to the appropriate posts. You are intentionally misrepresenting my statements. But I know you depend on your "memory" and I don't want to put that faculty under further strain, so rave on!