Quantum mind with a cat in a locked steel chamber, wherein the cat's life or death depended on the state of a radioactive atom, whether it had decayed and emitted radiation or not. According to Schrödinger, the Copenhagen interpretation implies that "the cat remains both alive and dead" until the state has been observed. Schrödinger did not wish to promote the idea of dead-and-alive cats as a serious possibility; on the contrary, he intended the example to illustrate the absurdity of the existing view of quantum mechanics. However, since Schrödinger's time, other interpretations of the mathematics of quantum mechanics have been advanced
Dead or Alive Ultimate 2", some changes to the music and remixes were added. Each character except Hitomi (which was introduced in "DOA3") has their own remix. The remixes only appear in the Dance Floor stage, The Ray House. The story mode of "Dead or Alive Ultimate" plays out as it did in the original. However, a new CG sequence is added further explaining the relationship and history of Ayane, Kasumi and Hayate leading into the first two Dead or Alive games. In 2004, after the release of "Dead or Alive 3", Team Ninja once again remade "Dead or Alive 2", this time for