  On the other hand, conventionalism still finds defenders. Lawrence Sklar (1977) advocates a refurbished version of geometric conventionalism. Alan Sidelle (1989) advocates conventionalism about necessary truth. Michael Dummett (1991), Christopher Peacocke (1987), and Dag Prawitz (1977) follow Gerhard Gentzen in treating certain fundamental inferences as “implicit definitions” of the logical connectives, a theory somewhat reminiscent of Carnap’s conventionalism about logic. Jared Warren (2015) invokes implicit definition to elucidate arithmetical vocabulary, defending on that basis a conventionalist treatment of arithmetical truth. Thus, the issues raised by Quine remain unresolved. Still, it seems safe to say that philosophers nowadays regard conventionalist solutions within metaphysics and epistemology more warily than philosophers from the pre-Quinean  era.[5]