Complex ideas and systems of knowledge
must be thoroughly evaluated in order for them to be correct. There are 3 Cs with which one can check any epistemology:
Is it Coherent? - The components of the idea must fit together logically. If it is not internally consistent, then it cannot be a valid theory.
Is it Complete? - If all the relevant issues aren't dealt with, what is the point of the idea in the first place? It should have no blind spots or gaps.
Is it Correct? - Fiction novels have the capacity to create worlds that are both coherent and complete. However, for something to be true, it must agree with external facts.
These 3 requirements represent the impossible ideal of every philosophy.