PTC.S2.Q11 - translating into logic

Ballon d'Or

In the stimulus, it says "A field of study is genuinely autonomous discipline by virtue of its having a unique methodology"

I translated that sentence to mean that IF a field of study has a unique methodology, THEN it is genuinely autonomous discipline.
But Superprep book explanation says "all that a field of study requires to be a genuinely autonomous discipline is a unique methodology" which I translate to mean that unique methodology is a necessary condition instead of sufficient condition.

I highly doubt that the Superprep book makes any mistake, but which translation is correct?

Thank you

runiggyrun

"All that a field of study requires" is another way of saying "this is a sufficient condition" (All it requires - it doesn't require anything else - it's sufficient by itself).
So you're both right. The Superprep explanation just chose an odd way of phrasing it.

MrSamIam

This one's a tad odd. However, @runiggyrun explained it well.
I thought of it like this: There is only 1 thing that is required in order to know that you have a genuinely autonomous discipline - a unique methodology. Since there is only 1, I know that once I have it, I can infer that the discipline in question is genuinely autonomous - after all, it's all we need in order for a discipline to be genuinely autonomous.