Brain in a vat

According to the New Oxford American Dictionary:

In philosophy, the brain in a vat (alternately known as brain in a jar) is a scenario used in a variety of thought experiments intended to draw out certain features of our ideas of knowledge, reality, truth, mind, consciousness and meaning. It is an updated version of René Descartes' Evil Demon thought experiment originated by Gilbert Harman. Common to many science fiction stories, it outlines a scenario in which a mad scientist, machine, or other entity might remove a person's brain from the body, suspend it in a vat of life-sustaining liquid, and connect its neurons by wires to a supercomputer which would provide it with electrical impulses identical to those the brain normally receives. According to such stories, the computer would then be simulating reality (including appropriate responses to the brain's own output) and the "disembodied" brain would continue to have perfectly normal conscious experiences, such as those of a person with an embodied brain, without these being related to objects or events in the real world.

Superimmortality predicts that brain in a vat can produce the same consciousness and ixperiencitness that a brain with the same structure and functioning does when connected to a human body. Since the stimulus that is applied to the brain in a vat is not limited to that that can only be produced by a human body many novel neuropaths thus novel awarepaths with the same ixperiencitness can be produced by physapaducers based on the concept of "the brain in a vat".