A perennial favourite: "If you torture the data enough, they will confess."

Often attributed to Ronald Coase, however this version was likely: "If you torture the data long enough, nature will confess" - perhaps implying a confession of truth. Another version, attributed to Paolo Magrassi: "If you torture the data enough, it will confess anything" - perhaps implying a confession of falsehood.

Personally, I find the ambiguous version of greater interest.