"There is all this controversy that women and girls are too skinny or too overweight. I say to just do martial arts and everything will be okay. You will tone up your body and find a confidence you can't find just sitting around watching TV and hanging out with friends."

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Notable enough, however, are the controversies over the series 1 - 1 + 1 - 1 + 1 - ... whose sum was given by Leibniz as 1/2, although others disagree. ... Understanding of this question is to be sought in the word "sum"; this idea, if thus conceived - namely, the sum of a series is said to be that quantity to which it is brought closer as more terms of the series are taken - has relevance only for convergent series, and we should in general give up the idea of sum for divergent series.

— Leonhard Euler