If you torture the data long enough, Nature will confess.
Coase - torture the data - wist_info quote

Ronald Coase (1910-2013) British economist, academic, author
(Attributed)

Criticizing econometricians. Cited as early as 1977. Variants:
  • "If you torture data long enough, it will confess to anything you'd like."
  • "If you torture the data long enough, it will confess to anything."