David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
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Studia Logica 41 (2-3):173 - 179 (1982)
In the first part of this paper we indicate how Meredith's condensed detachment may be used to give a new proof of Belnap's theorem that if every axiom x of a calculus S has the two-property that every variable which occurs in x occurs exactly twice in x, then every theorem of S is a substitution instance of a theorem of S which has the two-property. In the remainder of the paper we discuss the use of mechanical theorem-provers, based either on condensed detachment or on the resolution rule of J. A. Robinson, to investigate various calculi whose axioms all have the two-property. Particular attention is given to D-groupoids, i.e. sets of formulae which are closed under condensed detachment.
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References found in this work BETA
C. A. Meredith & A. N. Prior (1963). Notes on the Axiomatics of the Propositional Calculus. Notre Dame Journal of Formal Logic 4 (3):171-187.
Jan Łukasiewicz (1970). Selected Works. Amsterdam,North-Holland Pub. Co..
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