Kaku’s Three Classes of Plausibility

Kaku’s Three Classes of Plausibility

Class I: Plausible within 100 years

  • Force Fields
  • Invisibility
  • Phasers
  • Death Stars
  • Teleportation
  • Telepathy
  • Antimatter

Class II: Plausible within 1000 years

  • Faster than light travel
  • Time Travel
  • Parallel Universes

Class III: Implausible on any timescale

  • Perpetual Motion Machines
  • Precognition

Michio Kaku: Physics of the Impossible