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The rules of logical
derivation. This is a less popular thing to do, because the legal
steps in a mathematical derivation are typically very obviously truth-
preserving. math help, Here's a simple example of a mathematical derivation:
1) Assumption: Every natural number has a successor
that is itself a natural number.
2) Assumption: Zero is a natural number.
3) Definition: One is the successor of zero.
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4) Theorem: One is a natural number.
The only claim being made here is that if we accept the two
assumptions and the definition above, then we must accept that one is
a natural number. learn more on math forum.
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