There really isn't (on HN, at least) such a thing as 'very fairly criticizing [anyone's] lack of reading comprehension' in those exact terms, it's just a slight

There really isn't (on HN, at least) such a thing as 'very fairly criticizing [anyone's] lack of reading comprehension' in those exact terms, it's just a slightly wordier version of 'did you read the article/comment/etc'.