syncretism is my default. The only reason to choose one at the exclusion of another is if conclusions are based on fundamentally different assumptions. For example, ancient stoics would borrow from Epicureans when they made a good point. Likewise, Thomas Jefferson borrowed from both John Locke and others when drafting the Declaration of Independence. https://www.reddit.com/r/AskHistorians/comments/15f6pl/comment/c7m1fpn/