In the past year, The New York Times Sunday opinion page has run three different columns by Moises Velasquez-Manoff, a writer whose new book argues that the hygiene hypothesis — the idea that over-cleanliness can make you sick — is the one true cause behind everything from autism, to celiac disease, to allergies. While the hygiene hypothesis, itself, is perfectly plausible, Velasquez-Manoff’s extension of it to cover a host of hot-button disorders and cures for said disorders is much less plausible … something that was pointed out in a negative review of his book that ran in, yes, The New York Times. Matthew Herper explores this strange dichotomy at Forbes.