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  2. Rule-based system - Wikipedia

    en.wikipedia.org/wiki/Rule-based_system

    A classic example of a production rule-based system is the domain-specific expert system that uses rules to make deductions or choices. [1] For example, an expert system might help a doctor choose the correct diagnosis based on a cluster of symptoms, or select tactical moves to play a game. Rule-based systems can be used to perform lexical ...

  3. Rete algorithm - Wikipedia

    en.wikipedia.org/wiki/Rete_algorithm

    The Rete algorithm (/ ˈ r iː t iː / REE-tee, / ˈ r eɪ t iː / RAY-tee, rarely / ˈ r iː t / REET, / r ɛ ˈ t eɪ / reh-TAY) is a pattern matching algorithm for implementing rule-based systems. The algorithm was developed to efficiently apply many rules or patterns to many objects, or facts, in a knowledge base. It is used to determine ...

  4. Resolution (logic) - Wikipedia

    en.wikipedia.org/wiki/Resolution_(logic)

    The resulting inference rule is refutation-complete, [6] in that a set of clauses is unsatisfiable if and only if there exists a derivation of the empty clause using only resolution, enhanced by factoring. An example for an unsatisfiable clause set for which factoring is needed to derive the empty clause is:

  5. Forward chaining - Wikipedia

    en.wikipedia.org/wiki/Forward_chaining

    Forward chaining is a popular implementation strategy for expert systems, business and production rule systems. The opposite of forward chaining is backward chaining . Forward chaining starts with the available data and uses inference rules to extract more data (from an end user, for example) until a goal is reached.

  6. Hilbert system - Wikipedia

    en.wikipedia.org/wiki/Hilbert_system

    A graphic representation of the deduction system. In a Hilbert system, a formal deduction (or proof) is a finite sequence of formulas in which each formula is either an axiom or is obtained from previous formulas by a rule of inference. These formal deductions are meant to mirror natural-language proofs, although they are far more detailed.

  7. Quantum logic - Wikipedia

    en.wikipedia.org/wiki/Quantum_logic

    Examples of observables are position, momentum or energy of a particle. For classical systems, the value f(x), that is the value of f for some particular system state x, is obtained by a process of measurement of f. The propositions concerning a classical system are generated from basic statements of the form

  8. Deduction theorem - Wikipedia

    en.wikipedia.org/wiki/Deduction_theorem

    The deduction theorem is an important tool in Hilbert-style deduction systems because it permits one to write more comprehensible and usually much shorter proofs than would be possible without it. In certain other formal proof systems the same conveniency is provided by an explicit inference rule; for example natural deduction calls it ...

  9. Formal system - Wikipedia

    en.wikipedia.org/wiki/Formal_system

    A formal system is an abstract structure and formalization of an axiomatic system used for deducing, using rules of inference, theorems from axioms by a set of inference rules. [ 1 ] In 1921, David Hilbert proposed to use formal systems as the foundation of knowledge in mathematics .