Quote:
Originally Posted by DrRocket
I wish people would stop saying that "you can't prove a negative". In some cases you most certainly can prove a negative. Teaching this claptrap to youngsters is a decided disservice.
4) The sun is not powered by an external electrical current.
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Isn't it more about the form of the statement?
For example, you prove your negative (4), by falsifying the positive form "The sun is powered by an external electrical current". Or by a related, again positive, statement "The sun is powered by nuclear fusion".
I don't know about the mathematical proofs. And anyway I'm no expert, so explain away.
