A blog post by Alistair Roberts, as curated by Steve Sailer. (Steve's version is shorter and more targeted; the original blog post is the fourth in a series on triggering and suffers for its reliance on the particular issue.)
It seems like a very useful dichotomy, and strongly reminds me of Ask and Guess.
Yes, this is usually called deliberation, e.g. as in "deliberative democracy". But adversarial-style debate can be expected to persist for the foreseeable future, so it is important to be aware of its properties.