Epistemological states are states of degrees of knowledge in the mind. Mental states are psychological states like fear, love, etc.
I wonder how they affect each other? For instance, say that you hold two contrary ideas. Epistemologically you should have no knowledge and indeed one or both of these propositions should be rejected. Yet psychologically, they can both be accepted at different times. For instance, if I think (but do not know) that chocolate is bad I can sometimes decide that chocolate is good while holding to the idea that no chocolate is good. One can say that I implicitly believe that some chocolate is good, however where did that belief come from? It seems I concocted it from nothing. Then belief would not be based on evidence and as such, would have no epistemological value. That being the case, one must conclude that that belief would have only psychological value. Am I merely deceiving myself into thinking that I do hold these notions when I really am not, or do I really hold these two notions by some psychological power?
Is epistemology, fittingly separate from psychology or are they intimately related?