Unmeant, unintended

Charles Lassiter, Fordham University, “Speaker Meaning and Unmeant Conversational Implicature”

He also wrote on "unintended conversational implicature".

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Unlike a baby, an implicature is something said.

An unininteded baby is still a baby.
But is an unintended implicature still an implicature?
Grice should know. Or not.