What does “what is known” have to do with what is in fact?
By common usage (and probably definition) “is known” means that the subject is factual and people are aware of it. If people want to make a claim where the subject may not be factual but is still believed then they say ‘is widely believed’.
By common usage (and probably definition) “is known” means that the subject is factual and people are aware of it. If people want to make a claim where the subject may not be factual but is still believed then they say ‘is widely believed’.