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Solomonoff induction is an inference system defined by Ray Solomonoff that will learn to correctly predict any computable sequence with only the absolute minimum amount of data. This system, in a certain sense, is the perfect universal prediction algorithm. 

To summarize it very informally, Solomonoff induction works by:

  • Starting with all possible hypotheses (sequences) as represented by computer programs (that generate those sequences), weighted by their simplicity (2-n, where n is the program length);
  • Discarding those hypotheses that are inconsistent with the data.

Weighting hypotheses by simplicity, the system automatically incorporates a form of Occam's razor, which is why it has been playfully referred to as Solomonoff's lightsaber....

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