Alfred Tarski’s refinement of an account of truth into a formal system that turns on the acceptance of Convention-T has had a lasting impact on philosophical logic, especially work concerning truth, meaning, and other semantic notions.
Grice knew this, as he makes slight fun of Tarski in "Logic and Conversation" -- section on "Truth".
In a series of studies completed from the 1930s to the 1960s, Arne Næss (he of Diana Ross connection) collected and analysed intuitive responses from non-philosophers to questions concerning truth, synonymy, certainty, and probability.
Among the formulations of truth studied by Næss were practical variants of expressions of the form “p’ is true if and only if p’. This paper calls attention to a series of experimental results Næss overlooked in his original study.
These data collectively suggest that acceptance of expressions of the form “p’ is true if and only if p’ varies according to what kind of statement p is.
And the implicature is...?
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