Knowledge and Experience
Knowledge is derived from experience. I can say this with absolute certainty because I have experienced it.
You may think you know better and that you know very many things. However, until you have experienced them yourself those things are meaningless.
Someone elses knowledge is their own private store of what is, and what is not. Learning it is a fools game.
Take their lead and find out for yourself, get your own answers. If they corrilate then that's good. If they don't however and your findings contradict theirs, go with what you know at all costs. If you know your experience to be truthful and just, then this is knowledge of the absolute.
No-one should sway your beliefs unless there is something further for you to learn.