So where does all this leave us? Before answering that question, there is yet one other alternative that I should mention in the interests of completeness. That is the notion of solipsism. Solipsism is a philosophical doctrine that comes in many flavors, but the one most relevant here is the idea is that there is no reality other than consciousness. More specifically, the idea is that only consciousness exists and that all else is constructed in consciousness. It is as if the whole universe and our role in it is a gigantic simulation.