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Re: AL: If an alien species ever visited Earth, it would surely be because [#permalink]
For these types of argument questions I like to make a quick chart and make a few points on each argument.

AL
* Aliens communicate with intelligent life
* Never communicated with humans so no contact
Result: humans are smart according to AL, but no contact means no other intelligent life

Amy:
*Maybe Aliens have visited Earth but did not communicate by choice (implies ,humans are not smart).

So, need an answer that will give a reason to why she said that and how it relates to the first point:

Answer C, is the only possibility.
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Re: AL: If an alien species ever visited Earth, it would surely be because [#permalink]
Al's assumption; Human beings are intelligent.
She attacks this part of the argument.

(A) She misses Al’s point entirely. No, Al is talking about human beings and aliens and she contributes to that only.
(B) She attacks Al personally rather than his reasoning. No, Al is not the only human being. No personal attack.
(C) She points out that Al made an unwarranted assumption. CORRECT
(D) She ignores the detailed internal development of Al’s logic. Not relevant
(E) She introduces a false analogy. Definitely untrue.
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Re: AL: If an alien species ever visited Earth, it would surely be because [#permalink]
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