Möbius-Strip Crosswords

Robert Guilbert Sr., a retired Milwaukee ad copywriter, invented a crossword-based game called Pago Pago in the 1980s and reportedly designed a Möbius-strip crossword puzzle—an "infinity" puzzle without beginning or end. What began as speculation from Guilbert's son Jonathan about the connection between Pago Pago and the Möbius-strip design was subsequently reported as established fact in academic works, including Harvard dissertations and recent books, exemplifying how unverified claims can become accepted through repetition.