Palindrome (; "again") and ' (; "way, direction"). Palindromes date back at least to 79 AD, as a palindrome was found as a graffito at Herculaneum, a city buried by ash in that year. This palindrome, called the Sator Square, consists of a sentence written in Latin: "Sator Arepo Tenet Opera Rotas" ("The sower Arepo holds with effort the wheels"). It is remarkable for the fact that the first letters of each word form the first word, the second letters form the second word, and so forth. Hence, it can be arranged into a word square that reads in four different
Belief perseverance Belief perseverance Belief perseverance (also known as conceptual conservatism) is maintaining a belief despite new information that firmly contradicts it. Such beliefs may even be strengthened when others attempt to present evidence debunking them, a phenomenon known as the backfire effect (compare boomerang effect). For example, journalist Cari Romm, in a 2014 article in "The Atlantic", describes a study in which a group of people, concerned of the side effects of flu shots, became less willing to receive them after being told that the vaccination was entirely safe. Since rationality involves conceptual flexibility, belief perseverance is consistent with the view