The first paper, The hypnotic induction of hallucinatory color vision followed by pseudonegative afterimages, introduces an ingenious experimental paradigm whereby Erickson is able to explore the genuineness of hallucinatory color vision.

And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the LORD.

Tear it up, and put a fragment under the microscope, and, wonder of wonders! see the maze of geometric forms exhibited in the bones of the creature; for who can help regarding the spicules as bones, even though a sponge be invertebrate?

Some philosophers have objected to certain foundationalist solutions to the regress problem on the ground that a person rarely, if ever, holds given-beliefs of the sort needed to justify observation beliefs.