I have no idea what this is supposed to mean or imply in this context, but it seems to be a classic HN response asking people to judge a book by it's cover instead of its contents/arguments, which is even less helpful.
Objectivism is basically built on a bunch of strange axioms, and to a large part completely denies that they're arbitrarily chosen axioms instead of hard facts. They treat logic built on other axioms as inherently wrong.
It's hard to summarise. Read "Introduction to Objectivist Epistemology" which contains the fundamentals of a theory of knowledge, specifically a theory of the nature of concepts. That's the part which is relevant for this discussion and is also the foundation for everything else.
Ultimately you have to read Rand rather than read about her, as so many of her critics enjoy a somewhat loose relationship with reality. For example, the comment in this thread about "randian evangelism" on HN. I've encountered two other Objectivists on HN, whereas every week we have multiple hundred-comment threads on how fantastic an idea universal basic income is. That's pretty ineffective evangelism.
