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Which system inferred molecular structure from spectra?

  • A.DENDRAL
  • B.XCON, which assembled valid computer system configurations from a customer's order list
  • C.MYCIN
  • D.PROSPECTOR, which combined geological evidence to estimate the chances of an ore body

Answer: A

DENDRAL generated candidate molecular structures consistent with mass spectrometry data and is generally counted the first expert system. Its plan-generate-test organisation, using heuristics to prune an enormous space, became a standard pattern. XCON, MYCIN and PROSPECTOR worked in configuration, medicine and geology. DENDRAL also produced Meta-DENDRAL, an early attempt at learning the rules automatically. Most errors here come from carrying a result across from a neighbouring case where it does not hold.

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