Strength: Physical or Mental?

 

In the classic "chick or the egg" routine, I ask which is most important:

BRAINS or BRAWN or BOTH?

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With BRAINS and no BRAWN you get "genius inactivity"....  But with BRAWN and no BRAINS you get "fruitless effort"....  So it makes sense that you need both!  

BUT.....

If you have to favor one above the other, which wins?