Can the Duelist Academy advantage only be taken once? By default, advantages can only be taken once unless they explicitly say otherwise, and Duelist Academy doesn't, but there's this: "If you purchase this Advantage again, you gain an additional Dueling Style."

So which is it?

I was lurking on Reddit's 7th Sea page, specifically this thread after reading a comment on this forum thread, and saw this comment from Mike Curry:

[–]7thSea_devMichael Curry ✓ 3 points 2 days ago