Wikipedia says: In pragmatics, scalar implicature, or quantity implicature, is an implicature that attributes an implicit meaning beyond the explicit or literal meaning of an utterance, and which suggests that the utterer had a reason for not using a more informative or stronger term on the same scale.
There are some red marbles in the jar.
Implication: Not all of the marbles in the jar are red.
Q: Is John done with the test yet?
A: He has finished part one.
Implication: He is not done with the test.
Why is the conclusion implied but not stated? How obvious is the implication? If obvious, when is it still considered “implied”? Can “all” ever be “some”?
But wait, there’s more implicatures!