Forming in 2004 as Hindsight 20/20 the group defined Taiwan hardcore style by incorporating metal, emotional and progressive techniques in their music. Lead singer Jay and bass player Anarchy Allen had previously been members of Anarchy, an early Taiwan punk and metal group that even made its way to play a couple shows in the States. Anarchy Allen was also a leader of the feirenbang, or Useless Motherfuckers, a Taichung punk gang that had bands and shows in the early 2000's and was known for taunting Taipei fashion punks. In 2005, Hindsight 20/20 saw a few changes; Sharkie Hotpink joined for a bit and Anarchy Allen eventually left the group. Jay took control, changed the name to The Hindsight and began experimenting with more screaming emotional and mellow indie sounds. While Hindsight 20/20 never released anything they did lay down a few demo tracks. The Hindsight have appeared on the soundtrack to the Taiwanese indie film Island Etude, and 2008 saw the release of their first full length album entitled A Vow We made.
Anarchy Allen became manager of Fei Records, an installation at The Wall complex, and started organizing more punk events at the venue often with Fall of this Corner, thus making a base for Taiwan's small hardcore scene. Hindsight 20/20 was also instrumental in creating Hardcore Strike, a concert series which brought Endzweck from Japan to play a couple shows in Taipei. At large concerts like Say Yes to Taiwan, Anarchy Allen was the personality of the group known for ranting about China and heckling the audience. But the new Hindsight has emerged into a much more polished, emotional and experimental model.