Definitions

• Constants: a,b, dog33.

  • Name a specific object.

• Variables: X, Y.

  • Refer to an object without naming it.

• Functions: father-of

  • Mapping from objects to objects.

• Terms: father-of(father-of(dog33))

  • Refer to objects

• Atomic Sentences: in(father-of(dog33), food6)

  • Can be true or false
  • Correspond to propositional symbols P, Q

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