Are you confused about what a question is and what a claim is?

The question is about whether you believe they are fake or not. I don’t have any claims in either direction.

e.g. “Didn’t pan out that well” according to what authoratative sources?

You can’t get around it via linking a wikipedia article with opinions expressed by other random people, without any more authority or credibility than many HN users.

Edit: And if there is no source with such, then it needs to be proven via logical arguments, observational evidence, etc.