 In this situation the sentence B uttered does not logically imply that the station is open. However, the remark is irrelevant unless the station is open, so A can infer from the combination of Manner and Quality that B believes he has good evidence that the station is open. Thus B’s utterance conversationally implicates that the station is open. One characteristic of conversational implicatures is that they can be cancelled. Thus if B adds to his remark above, “but I don’t know whether it is open” then there is no conversational implicature that the station is open. This contrasts with logical or semantic implications which cannot be cancelled without contradiction.