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Q: Geometry ( Answered 5 out of 5 stars,   0 Comments )
Question  
Subject: Geometry
Category: Science > Math
Asked by: teatea-ga
List Price: $2.00
Posted: 09 Aug 2003 21:29 PDT
Expires: 08 Sep 2003 21:29 PDT
Question ID: 241994
What would be the counterexample to the statement below:
IF THE SUM OF TWO INTEGERS IS EVEN, THEN BOTH OF THE INTEGERS ARE EVEN
Answer  
Subject: Re: Geometry
Answered By: juggler-ga on 09 Aug 2003 21:44 PDT
Rated:5 out of 5 stars
 
Hello.

"A counter example demonstrates that an assertion is false and even
one counter example is enough to prove that an assertion is false. 
For example if an assertion is made that all dogs have four legs, and
a dog with three legs is found, then the assertion that all dogs have
four legs is proven incorrect."
http://www.mcoe.org/instruct/dm/glossary/counter_example.htm
------------

Now, consider the statement:
IF THE SUM OF TWO INTEGERS IS EVEN, THEN BOTH OF THE INTEGERS ARE EVEN

Here's a counter-example:

3 + 5 = 8.

Here, the sum of the two integer is even (i.e., 8), but the integers
(3 & 5) are NOT even.

search strategy: "counter example is"

I hope this helps.
teatea-ga rated this answer:5 out of 5 stars

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