Not So FatsoScience brain teasers require understanding of the physical or biological world and the laws that govern it.
A young man wanting to tease his sister while they were swimming called out "Look! You're so fat you can't even float like me. You just sink to the bottom!"
To which she replied, "The fact that I sink just proves how stupid you are."
She was right. Why?
AnswerFatter people have greater buoyancy than thinner, more muscular people do, because fat is less dense than muscle. So the fact that she sank proved him wrong.
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