The CAPTCHA meme mimics the 'Completely Automated Public Turing test to tell Computers and Humans Apart' used by websites to block bots. It specifically parodies Google's reCAPTCHA 'Select all squares with...' format. The meme became a viral sensation as a way to joke about how difficult it is to distinguish between similar items—like blueberries versus muffins—or to sarcastically ask users to identify abstract concepts like 'toxic behavior' or 'bad takes.' It perfectly captures the universal frustration of digital security while providing a versatile grid for social commentary and visual puns.