"as for your comprehension ability, that's debatable" This comes across as rude, especially in response to someone that did not themselves say anything warrant

"as for your comprehension ability, that's debatable" This comes across as rude, especially in response to someone that did not themselves say anything warranting a rude response. You can disagree and make your point without doing this. I'm pointing it out because you genuinely may not be aware and I want to give the benefit of doubt (something I myself too often do not do online).