Whoever undertakes to set himself up as a Judge of Truth and Knowledge is shipwrecked by the laughter of the gods.  Albert Einstein

The difference here in knowing Truth and Knowledge is the source of that determination.  I believe that would be the word JUDGE.  Judging, in my definition, is sorting out with the brain perceived information to make a judgement.   I hope I am not guilty of this type of superiority as to think I know when I can only surmise.  To surmise is just to make an opinion or conjecture.

When I do have a knowing,  it is not from my brain; but from my heart and the emotion that a situation gives me.   Not that I have clear understanding, but a hint that all presented is not all there is to the picture/situation/person as really authentic.  Or a knowing to follow a certain course of action that the brain hasn’t dictated.

This is also a trust issue that I can winnow out what information from myself or others is a ‘knowing of the brain‘ vs the ‘knowing of the heart.’  Do not disregard lightly information from the heart.