Name: Anonymous 2012-01-30 5:20
How can I know that my senses are perceptions of reality and not just delusions? How can I differentiate between real life and hallucinations? Is there even a difference? How can I know that what I see is the same as what other people see? How, as myself, can I know that other people exist, if I can't see from their perspectives? How can I prove that I myself exist?