Stan has figured out a way to implement all logic functions without negation. 2-terminal devices are much easier to assembly on the nanoscale, using simple crossbars of metal, and/or self-assembly techniques. It is easy to implement all logic functions using only NAND or NOR gates, but not with just an AND or OR gate. He found the premise for this in a 160 year old philosophy book, and he calls the new gate IMP.

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