Abstract
[10] offers two (cut-free) subscripted Gentzen systems, G 2 T + and G 2 R +, which are claimed to be equivalent in an appropriate sense to the positive relevant logics T + and R +, respectively. In this paper we show that that claim is false. We also show that the argument in [10] for the further claim that cut and/or modus ponens is admissible in two other subscripted Gentzen systems, G 1 T + and G 1 R +, is unsound.
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Giambrone, S. On purported Gentzen formulations of two positive relevent logics. Stud Logica 44, 233–236 (1985). https://doi.org/10.1007/BF00394443
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DOI: https://doi.org/10.1007/BF00394443