I pointed out that he never expressed his point and then he comes back with a quote that again is not anything he said. Sad indeed.

And yes, these sorts of discussions do occur in person, although I rarely encounter people who say things like "orcas attack moose" with ZERO elaboration--that is indeed strange. And if someone said that's irrelevant and they then said "My point was ..." I would still say "Well, you didn't say that".