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Recently Wesley Salmon has argued that a certain class of confirmation functions (C-functions) must be rejected for yielding contradictions. The C-functions involved happen to be the kind ingeniously constructed and employed most notably by Professor Carnap. More recently Keith Lehrer has argued that these C-functions may be salvaged by the adoption of a rule that eliminates certain languages. In the paragraphs that follow, it will be shown that Salmon's reply to the sort of program suggested by Lehrer is not at all convincing and that Lehrer's defence of his suggested rule of greater completeness is unacceptable.