At least 15 percent of human females possess a genetic mutation that gives them an extra (fourth) type of color photoreceptor - and this allows them to discriminate between colors that look identical to the majority of us with a mere three types of color photoreceptors.

In our current understanding of science, we can't find the physical gap in which to slip free will - the uncaused causer - because there seems to be no part of the machinery that does not follow in a causal relationship from the other parts.

Interestingly, schizophrenics can tickle themselves because of a problem with their timing that does not allow their motor actions and resulting sensations to be correctly sequenced.

I call myself a Possibilian: I'm open to...ideas that we don't have any way of testing right now.

Given the billions of neurons, this means there are as many connections in a single cubic centimeter of brain tissue as there are stars in the Milky Way galaxy.

If our brains were simple enough to be understood, we wouldn't be smart enough to understand them.

As Carl Jung put it, "In each of us there is another whom we do not know." As Pink Floyd sang, "There's someone in my head, but it's not me."