[rosser]

It's customary in some contexts to italicize "loan words". The terms for the fallacies come from the Latin. Ergo...

As for your second point, I think it's pretty clear from both my comments and their context why I'm pointing out those fallacies. That said, in the case of "non sequitur", I was actually referring more to the literary sense of the term — "Where the hell did that come from?" — than the fallacious "does not follow" sense.

[devilsavocado]

Those terms are used all the time on hn but not usually italicized, but that's fair, I get your point.

When you respond twice in a row in a comment chain saying that they are using a logical fallacy, and nothing else, you've done nothing to add to the conversation, but are playing the role of Logic Studies 101 Professor. That's probably what they meant by the looking back on on your writing comment.