Are you sure you want to leave?

Your test is still in progress. If you leave this page or go back now, all your attempt wil not be saved.

You order a taxi through the phone. When the taxi arrives, you get a notification on your phone.

Andrew: “Taxi is here, but there is no notification, so that it must mean this is not our taxi.”

Brian: “No, the taxi is here so that must mean that it is our taxi.”

Whose reasoning is correct?