a: I have a problem, doctor. I'm not conscious.
b: How do you know?
a: The same way you know you are conscious. It's self-evident.
b: Being conscious is self-evident. Being not conscious is not. My diagnosis is that you think you're unconscious even though you're not.
a: Being conscious is self-evident?
a: It is not evident to me that I'm conscious. I've got to be unconscious. What other alternative is there?
Pictured: an incubus,