xkcd: A New CAPTCHA Approach

Special 10th anniversary edition of WHAT IF?—revised and annotated with brand-new illustrations and answers to important questions you never thought to ask—out now. Order it here!

A New CAPTCHA Approach

Permanent link to this comic: https://xkcd.com/233/
Image URL (for hotlinking/embedding): https://imgs.xkcd.com/comics/a_new_captcha_approach.png

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Comics I enjoy:
Three Word Phrase, SMBC, Dinosaur Comics, Oglaf (nsfw), A Softer World, Buttersafe, Perry Bible Fellowship, Questionable Content, Buttercup Festival, Homestuck, Junior Scientist Power Hour

Other things:
Tips on technology and government,
Climate FAQ, Katharine Hayhoe

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