A theory in a language with constants has the Henkin witness property when every existential sentence belonging to it has an instance belonging to it for some constant . This property proves the existential step of the truth lemma for a Henkin term model.

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  1. Henkin construction
  2. Godel completeness theorem
  3. First-order logic
  4. Mathematical logic
  5. Foundations of mathematics
  6. Area of mathematics
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