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.
Consider this discussion. Is Pauli's statement "unsporting"? (I find it really odd that you used that word to describe the adversarial mode; it sees debate as a verbal sport, engaged in for both fun and profit.)
Pauli's statement in a debate would be somewhat unsporting, yes. But it seems that the context was instead a discussion among friends, where a joke like that would be seen as funny by all, rather than being seen as point-scoring.
I used that word deliberately, since the title of the article includes "debate as sport". Perhaps some people think the sport in question is more like fox hunting than basketball?