Looks like someone forgot to double-check their work : r/ProgrammerHumor

Double Check synonyms - 119 Words and Phrases for Double Check

Double-check, Double check, or Doublecheck?

Double check

Simple Word Problem- Double check answer? - Online Technical Discussion Groups—Wolfram Community

Premium Vector Word cloud background concept for bookkeeping financial budget business transaction credit of payment double check vector illustration

Word cloud background concept for Bookkeeping. Financial budget, business transaction credit of payment double check. vector illustration Stock Vector Image & Art - Alamy

Just had to double check make sure I wasn't hallucinating.

Checking Your Margins Using Double-Side Formatting

Ultimate Puzzle Challenge! - (highlights) (paperback) : Target

Ambesonne Purple and White Throw Pillow Cushion Case Pack of 4, Home Phrase and Word Lettering with Rhombus Check and Abstract Waves Print, Modern Accent Double-Sided Digital Printing, 16, Violet