Wigner's friend and continuous time evolution of the state of a closed system and the probabilistic, discontinuous collapse of the state of a system upon measurement. Wigner's friend is therefore directly linked to the measurement problem in quantum mechanics with its famous Schrödinger's cat paradox. The thought experiment posits a friend of Wigner in a laboratory and lets him perform a quantum measurement on a physical system (this could be a spin system or also Schrödinger's cat). This system is assumed to be in a superposition of two distinct states, say, state 0 and state 1 (or "dead" and "alive", in the
Dead or Alive 5 5" features "better than ever" graphics and its improved fighting system "is another step in the right direction," and while "the game’s story mode leaves much to be desired," "Dead or Alive 5"s "new fighting mechanics and flashy stage effects turn battles into an entertaining, over-the-top experience." Joystiq's Ludwig Kietzmann called "Dead or Alive 5" a "success as an energetic revitalization of the series." Kotaku's Mike Fahey wrote that "while "Dead or Alive 5" is far from a complete overhaul of the series, it charges into the fighting game scene with all the spirit of a completely new game." Ernest