Actual Implicature

An actual implicature is any potential implicature that is not canceled by its context.
Example (English) :
The expression I think that some went has two potential implicatures:

• The matrix sentence I think ... has the potential implicature "I don’t know [that some went]."

• The complement clause ... some went has the potential implicature "not all went."

Of the two potential implicatures, only I don’t know that some went is an actual implicature, because the other occurs in a complement clause that the matrix clause does not entail. If some went were uttered independently, as a main clause, its potential implicature ‘not all went’ would also be its actual implicature.

Here are some kinds of actual implicatures:

• What is conventional implicature?

Conventional implicature is an implicature that is part of a lexical item’s or expression’s agreed meaning, rather than derived from principles of language use, and
not part of the conditions for the truth of the item or expression.

• What is a nonconventional implicature?

An nonconventional implicature is a implicature that is drawn in accordance with pragmatic principles, such as the cooperative principle or the informativeness principle, rather than the meaning of a lexical item or expression.