Rational proof is governed by the rules of logic, considered by many to be the basis of good thinking. Testing ideas through the use of continuous questioning and thoughtful examination. Empirical proof is proof arising from careful observation of events in nature; proof that forms the basis for scientific discovery. Form of proof in both natural and social science, including sociology. An attempt to support or refute an idea on the basis of independent observation by many individuals. Linda
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A proof uses postulates and theorems to prove some statement.
flow proof is just run of text 2 colmn has line/column breaks
A proof coin has a special shiny finish on it and it is made to be sold to collectors, and not used as money.
Difference is Four Hundred and ninty.... proof 820-330=490
sqrt(2) is irrational. 3 is rational. The product of an irrational and a non-zero rational is irrational. A more fundamental proof would follow the lines of the proof that sqrt(2) is irrational.