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April 24, 2014

Homework Help: Geometry (Logic)

Posted by Lisa on Tuesday, February 7, 2012 at 7:37pm.

Which argument is not valid?


1.) Given: a→b
a
Conclusion: b

2.) Given: a˅b
~b
Conclusion: ~a


3.) Given: a→b
~b
Conclusion: ~a


4.) Given: a→b
b→~c
Conclusion: a→~c

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