Where do you see causality implied in that title?
Have you been drinking? :-)
Have you been drinking? :-)
"Drunks are smart people"
The reversal should be meaningless if the title only implies correlation, since correlation is bidirectional. However, since the reversal is not meaningless, then the title must imply causation.
That being said, I missed the possibility of a 3rd underlying factor. The title is agnostic about this possibility.