@slimboyfat
I would argue that there is a difference between believing something and knowing it. If you are unable to prove something you don't know it, you believe it.
Philosophy is useful in forming beliefs more so than knowledge, in my opinion anyway.
History is just belief unless the scientific method is applied to provide evidence of the supposed events.
Poetry is highly subjective, so once again not knowledge in and of itself because it can't be proven correct or incorrect.
Sociology is a actually a science, it's a branch of psychology. (Though one with an especially high margin for error in my opinion.)
And an experience without proof that it happened could easily be fictitious.