The first in an on-going series.
Today, Hal demonstrates his own personal philsophy:
philosophical idea that one's own mind is all that exists. Solipsism is an epistemological or ontological position that knowledge of anything outside the mind is unjustified. The external world and other minds cannot be known and might not exist. In the history of philosophy, solipsism has served as a skeptical hypothesis.
Because it's all about Hal, you know.
Other famous solipsists include A.E. Housman, God, Archie Andrews, and Stan Lee.