• If the Peltier elements are placed much closer (5 mm = 0.2 inch instead of 15 mm = 0.6 inch) the illusion is not stronger. It seems a little weaker.
• If the skin is more sensitive, then the burn sensation should be stronger, right? Not always. For example, with the tongue there is no burning illusion at all. Only well distinct cold and warm plates are felt instead. The alternating temperature are felt normally, nothing like the "burn" felt by the hand.

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