Absolute Certainty

Is it possible to know anything with absolute certainty? I have been looking at Descartes meditations but my instructor pointed me to epistemology. Can I just get some directions on how to prove that there is no such things as knowing something with absolute certainty.

Does Rene Discartes view knowledge as justify true belief?

Does Rene Discartes view knowledge as justify true belief? Yes or no? Explain why? Give necessary background material and definitions. Assume that the reader does not know the topic, give detailed explanations.