Markovian Parallax Denigrate

Markovian Parallax Denigrate is a series[1] of unexplained texts posted to Usenet in 1996.[2] The posts are often mentioned in conjunction with other bizarre or unsolved (or both) internet mysteries, such as Sad Satan, Cicada 3301, the Publius Enigma, and Unfavorable Semicircle. Hundreds of messages were posted and initially dismissed as spam.[3] It has been referred to as "the Internet’s oldest and weirdest mystery",[4][2] and "one of the first great puzzles of the internet".[5]

In 2016, Susan Lindauer was mistakenly identified as a possible source of these posts; when contacted, she denied being the author.[2] A Daily Dot article covering the event states that an e-mail account belonging to a University of Wisconsin at Stevens Point student coincidentally named Susan Lindauer was spoofed to cover the identity of the poster.[4] Proposed explanations for the texts include an early experimental chat bot or text generator,[3] an internet troll or prankster posting forum spam,[2] or a programmer experimenting with Markov chains.[4] A March, 2020 AV Club article proposes the event became a "mystery" due only to later media coverage.[6]