A passenger in a train carriage, while parked, noticed that the train on the next track began to move slowly.

A passenger in a train carriage, while parked, noticed that the train on the next track began to move slowly. What guess can the passenger make? How can I check it?

The train could start moving on the next track, train with. passenger, as well as both trains at the same time. To determine whether a train with a passenger is moving or not, you can look at the people on the platform.

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