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knobunc's reply is good. Check Language::Prolog As far as I know, it is currently a beta version.
But, if you want to "reinvent the wheel", you should consider reading something on the following topics:
  • Propositional logic
  • Predicate logic
  • Herbrand's Theory
  • Godel-Herbrand-Skolen Theorem
  • Resolution and Robinson's Algorithm
  • Horn Clause Programs
  • Prolog
You can check them in that order :)
Logic programming slogan "I tell you what I know and what I'd like to know, without telling you how" showed its practical unapplicability over the years: every logic programming language includes extralogic operators, such as cut, that introduce elements of imperative programming in the language ("I tell you what I know and what I'd like to know, without telling you how... Well, I will help you a bit").
Despite of their impure nature, logic programming languages are very interesting and I think they're worth studying.

In reply to Re: Rules-based Perl? by larsen
in thread Rules-based Perl? by Masem

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