Tolerance is best. Intolerance makes you the asshole. 知不知上 不知知病
In fact, not being an asshole is the secret of not getting pwned. 夫唯病病 是以不病
Good listeners don't get pwned because they're not the asshole. 聖人不病 以其病病
They know the secret of not getting pwned. 是以不病
知 is know, a verb, but can be knowledge, a noun.
知不知 is realizing that you, or someone else, might not know what you're talking about. Either is fine. Ignorance is our default state, after all.
不知知 is not acknowledging this realization (of ignorance). It's the arrogance of trolls and believers.
病 is illness or fault as a noun, or troubled by as a verb, and 病病 is troubled by illness or by making mistakes.
So it's a warning. Ignorance is fine, but ignorance and arrogance get us in trouble when we mess with the unknown.