Solipsism is a belief that you exist and that all the things going on outside of you are not guaranteed to exist, and therefore probably do not. A solipsist is capable of denying the existence of up to four-thousand things per hour (widely accepted by science as the largest number of things that one can experience in that time). To be a solipsist, one must be self-concerned. That is to say, one must be as self-concerned as they possibly can. [Note. It is no small coincidence that most solipsists hold a liberal arts degree.]

Solipsism is useful, seeing as it removes all social restrictions -- not the least of which being a need for a moral structure. What reason does one have to consider how their actions affect a nonexistent other? Still, many find it difficult to reconcile this philosophy with all the beings that are constantly, for example, pushing shopping carts around them, attempting to engage them in conversation, and just generally and in various other fashions appearing to exist.