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Victorian Symbolic Logic

Victorian Symbolic Logic. Paper by John Swartz Presentation by Stan Lovric. Problem Definition. Syllogism: Some holidays are rainy. Rainy days are tiresome. Some holidays are tiresome. CLIPS implementation of a syllogism proving system

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Victorian Symbolic Logic

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  1. Victorian Symbolic Logic Paper by John Swartz Presentation by Stan Lovric

  2. Problem Definition Syllogism: Some holidays are rainy. Rainy days are tiresome. Some holidays are tiresome. • CLIPS implementation of a syllogism proving system • Based on “Symbolic logic” published by Lewis Carroll in 1896. • The system solves two kinds of syllogisms. (1) given two premises and a conclusion, it checks the correctness of the conclusion and (2) given only two premises, it derives a conclusion if there is one.

  3. Motivation • Feasibility study of natural language processing system (NLP). • Use layers of abstraction to implement a complex system. • Begin with CLIPS as the lowest level of abstraction. • To solve the problem, the software engineer must implement the intervening abstraction layers.

  4. Program Output • CLIPS> (run) • input line value is: >>>> some holidays are rainy: rainy days are tiresome. some holidays are tiresome. • The subject syllogism is true!!! and is of type >>> ([figureTwoA]) • input line value is: >>>> no m' are x: some m' are y'. • The subject syllogism implies the following conclusion >>> some x' are y' • input line value is: >>>> all x are m: no y are m'. no y are x'. • The subject syllogism is false!!! () • input line value is: >>>> EOF • Thus endeth the input file • CLIPS> (exit)

  5. Conclusion • The author wanted to show a possible path to the general solution of the NLP problem. • Interesting approach, but no information about the outcome of the effort.

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