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Last sentence of the abstract:

> These results suggest that compatibility elements of human mating are challenging to predict before two people meet.

That's a pretty generous definition of "suggest." Could be that they aren't studying the right metrics before meeting.

Exactly. It's possible there are other features that would have more predictive power, they just haven't figured out how to quantify them. The title of the paper could be, "We're still not very good at describing what makes people attractive."

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