![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
If - then form: If a number does not an irrational, then the number is a whole number.
\Hypothesis: a number does not an irrational.
\Conclusion: the number is a whole number.
\The statement is false. The number ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=74f3d3e4c40071d7ac71e61153308410.png\")
is a counterexample, because ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=74f3d3e4c40071d7ac71e61153308410.png\")
does not an irrational number but it does not a whole number.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
If - then form: If a number does not an irrational, then the number is a whole number and this statement is false.