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291 bytes added ,  04:49, August 13, 2023
add counterexample list
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The word counterexample originated in mathematics. It means an example that contradicts a general statement; therefore, the single example proves the statement false. Consider the statement  
 
The word counterexample originated in mathematics. It means an example that contradicts a general statement; therefore, the single example proves the statement false. Consider the statement  
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"Every number ending in the digit 7 is prime." 7, 17, 37, 47, 57, and 67 are all prime, but 27 is not, so 27 is a counterexample.[[Category:Mathematics]]
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"Every number ending in the digit 7 is prime." 7, 17, 37, 47, 57, and 67 are all prime, but 27 is not, so 27 is a counterexample.
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==See also==
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*65 [[Counterexamples to an Old Earth]]
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*54 [[Counterexamples to Evolution]]
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*52 [[Counterexamples to Relativity]]
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*5 [[Counterexamples to an Ice Age]]
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*3 [[Counterexamples to String Theory]]
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*Numerous [[Counterexamples to Global Warming]] (article not organized the same way)
    
{{Counterexamples}}
 
{{Counterexamples}}
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[[Category:Mathematics]]
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