Epistemology The branch of philosophy that studies the nature of knowledge, its presuppositions and foundations, and its extent and validity [Dictionary.Com].
I know what I know and you know what you know but who's right if what you know and what I know do not agree?
This is not always a simple question to answer and my simple philosophy is that probably we're both right, unless you're lying. And among my challenges in life is to better see what it is that is not clear to me. To ask, what is it that we are saying that is creating the difference?
I do tend to get angry if I don't understand but please forgive me. It's all a part of the big mosaic of life.