Philosophy in "The Office"

In the following video Jim uses the paradox produced by the concept of memory to demonstrate that we really cannot know for sure in this skeptical dilemma (if you were Dwight) whether or not you have taken drugs and cannot remember that you took them.  Memory is fallible and thus you may have been doing something in Europe yesterday, but it's possible you simply cannot remember it (assuming there's no immediate or overwhelming evidence to begin your skepticism).