This is the highest level of knowing. It is not always about what's true and what's not, sometimes it's about understanding the various level of truth which applies best to a situation.
It is similar to the level of truth Neil deGrasse Tyson discusses here when making a distiction between subjective truth and objective truth. *Subjective truth is similar to saying "I feel there is a fire on the other side of the mountain; or 'I believe' there is a fire on the otherside of the mountain. That is true. The pesron does beleive it (as far as we know) but that's all we know. It's not really useful informaion. Tried and true or tested information tends to benefit society because we don't live in other people's heads and can't rely on that as a working foundation of knowledge.