Geometry (Logic)

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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

  • Geometry (Logic) -

    #2 is not an argument, since there is no implication.

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