People who are red/green color-blind cannot distinguish between green and brown. Gerald cannot distinguish between gr...

ZackWVan June 19, 2020

Can't Conclude with a Sufficient Premise

To do questions like this faster, could't we already conclude the argument was flawed due to it concludes with a sufficient premise and then look for a parallel argument with that flaw? I did that and was correct in my answer choice, But I want to make sure it wasn't a fluke.

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BenMingov June 19, 2020

Hi ZachWVan, thanks for the question.

I think this argument actually tries to conclude using a necessary premise as its reason. If we look at the underlying structure here,

A -> B, Since B, therefore A.

In this way, you can match the structures relatively quickly and with a high degree of confidence.

I hope this helps. Please let me know if you have any other questions!