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Knowledge Representation

Reference: Chapter 13 of Allen
Aim:
To outline a representation of the facts conveyed by NL text, based on first-order predicate calculus, and to describe how quantifiers can be avoided in this notation by replacing existentially quantified variables by Skolem constants and Skolem functions, and then assuming all remaining variables are universally quantified.
Keywords: KB, knowledge base, knowledge representation, knowledge representation language, KRL, Skolem functions, skolemization
Plan:
  • Knowledge Representation Languages
  • Representing quantification in a KRL
  • Free variables for "forall"
  • Skolem constants and Skolem functions for "exists"