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(article, Culinate staff)
A few years ago, science announced that obesity was contagious — that, in other words, hanging out with fat people could lead you to become fat yourself. Now, however, come the contrarian reports, asserting that no, our social habits aren't to blame for our current obesity epidemic. At issue are whether the statistical models used in the original study were valid or not — and the scientists involved can't agree: bq. At the heart of the dispute is an old conundrum in social science: How certain can anyone be about conclusions based on observations of how people behave?