Possible situations

• 3. C does not ìknowî fC(x) and R provides fR(x).

  • E.g. Weather forecast; Some control systems.
  • E.g. C doesnít know but can verify Rís service by .
  • Simulation-based learning and reinforcement learning etc.

• 4. C does not ìknowî fC(x) and R does not provide fR(x).

  • Basically this situation can be reduced to a combination of the above two.
  • E.g. R offers hashed result , C can verify Rís service by .

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Some complicated example. Control system. Indirectly