I'm generally not looking to organize my thoughts. I'm looking to record my conclusions and ideally some way to see the history of that.

I too often feel like my brain is like Twitter/etc. I read an article, but summarize it heavily and forget the rest. I want to A: record the summary, so at least i don't forget that, and B: ideally record a few facts that lead to that summary-conlusion-thing. So if i have to rethink my conclusion i'll know what source material it came from.