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Is the following argument valid or invalid?

All non-octopi are orange;

Shannon is not orange;                 

Therefore, Shannon is an octopus.

 

I really need help with this question! Thank you!

 Jun 7, 2017
 #1
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This is a valid argument.

As everything that isn't an octopus is orange, and since Shannon is not orange, Shannon much be an octopus.

 Jun 7, 2017

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