The most reasonable means I have available to me to test the validity of truth, is to evaluate the ideas I purport to be truth, against challenges asserted by others.
The difference between you and I, is that I don't run from such challenges. In fact, I seek them out (so as to better understand what I know, and what I don't know).
Each time you and your buddies hit the abuse button because you're unable to defend your ideas, it serves to reinforce the validity of those ideas you cannot rebutt.