Ouch. Look, I know how explosive all this is and I don't need to ban someone for having strong feelings. But we need to hold the container in a certain way.

It's fine to say that another comment is false, especially if you then add corrective information. It's fine to say that it's misleading, if you show how and (again) add corrective info. But to say that another user is lying crosses a clear semantic line: it imputes malicious intent, i.e. not just that they're wrong but that they know the truth and are intending to deceive. That we don't allow. Surely it's not hard to see why.

https://news.ycombinator.com/newsguidelines.html