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PT 13, Sec. 2, Q26. Does "the only" in answer choice B refer to a necessary, or sufficient condition? Also, what exactly is "the condition" and "phenomenon" in B? Thanks
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Never mind. Looks like you're right. Thanks!
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Sorry, the “#help” is a feature for comments in the lessons. Putting the “#” sign in the beginning of your post makes the font size really big on the Forum (This is because you can use Markdown in your post.) :sweat_smile:
That being said, this question is testing a simple sufficiency/necessity confusion error.
A (switch suppliers)→ B (no profit)
B (no profit)→ A (switch suppliers)
But I get that (B) is confusing. I think (B) correctly points out the flaw by saying:
The argument didn't show that a condition [= A (switch suppliers) ] under which a phenomenon [=B (no profit)] is said to occur is the only condition under which the phenomenon occurs, which means....
The argument did not establish that
the only condition under which the phenomenon [=B (no profit)] occurs is the condition A (switch suppliers).
= the phenomenon B happens only when the condition A occurs.
If A is the only condition under which a phenomenon (B) is said to occur, then that means B → A (A ↔︎ B ).
I know that you are asking, "Wait, but "the only" introduces sufficient conditions, right?" And you are right. I think "the only condition under which the phenomenon [=B (no profit)] occurs is the condition A (switch suppliers)" can be translated as:
The only condition that makes B happen is the condition A. (B → A)
The only time the phenomenon B occurs is under the condition A. (B → A)