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Assistant for generating NaturalDeduction style proofs
This application aids in the creation of NaturalDeduction style logical proofs. The style is that used in University of Auckland Philosophy courses.
Upon inputting a sequent, a proof can be completed within NaturalDeduction Planner. The result can be exported to png, to text or to LaTeX macros.
Highly configurable proof / disproof editor and calculator
Jape is a configurable graphical formal-proof calculator. It's possible to define a logic, decide how your users will view their proofs, and much more. It works with variants of the sequent calculus and naturaldeduction, as well as functional programming theories and theories of operational semantics.
Mac, Unix, Windows.
Superficially, Dominoes on Acid is a solitaire variant of Dominoes with weird colorful tiles. But on a deeper level it is a GUI for naturaldeduction. Every completed domino is equivalent to a proof of a tautology in classical propositional logic.
Deduce is an artificial intelligence program which accepts natural language sentences as input, then allows the user to ask questions against that input. Deduce attempts to answer questions using logical deduction techniques.