Fashionable Nonsense: Postmodern Intellectuals' Abuse of Science, first published in French in 1997 as Impostures intellectuelles, is a book by physicists Alan Sokal and Jean Bricmont. As part of the so-called science wars, Sokal and Bricmont criticize postmodernism in academia for the misuse of scientific and mathematical concepts in postmodern writing.

Alan David Sokal is an American professor of mathematics at University College London and professor emeritus of physics at New York University. He works in statistical mechanics and combinatorics. He is a critic of postmodernism, and caused the Sokal affair in 1996 when his deliberately nonsensical paper was published by Duke University Press's Social Text. He also co-authored a paper criticizing the critical positivity ratio concept in positive psychology.