Karl Popper

Karl Popper had one of the most interesting epistemological ideas regarding how you acquire knowledge and why.

He was a Austro-British philosopher that created the idea of revolutionary epistemology, this theory states that all theories about epistemology are an evolution of the previous one. This means that Aristotle’s theory is an evolution of Plato’s, but with more information. He also said that all theories were correct in their time, but as the years pass they become inadequate for that time. 

He also said that all theories will be incorrect someday because they will be obsolete as the new knowledge we have of the world was not considered when creating them.