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A Small Thought/logic Exercise.

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Posted by Michael Wright on February 5, 2002 22:33:38 UTC


Do you think that it is possible to prove that the sun will rise tomorrow? If so, prove it!

The reason I ask this is because about a week or two ago I started reading David Hume (as some of you already know) and he says that saying that the sun will rise tomorrow is a 'matter of fact.' That is, we say it will because of experience - it has risen every day before this and we assume it will rise tomorrow.

I believe that we CAN prove that the sun will rise tomorrow, by using the same system to prove geometric proofs - like the Pythagoream Theorem.

Geometric proofs rely on definitions (like the definition of a point, or of a line) and postulates (axioms) assumed to be true. They are used in this manner: If these postulates are true, then this MUST be true.

I will attempt to prove that the sun WILL rise tomorrow IF some postulates (which I will have to come up with) are true.

Would any of you care to try your hand at it, too? I am looking for a formal logical deductive argument.

It's just a little thought for fun, and I thought I might as well get your ideas as well, since I think that many of you could use a break from your normal debates :-p

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