In part, this is a confusion caused by semantics and inherent difficulties with any kind of abstraction. The notion of a 'team' in real life is a very flexible

In part, this is a confusion caused by semantics and inherent difficulties with any kind of abstraction. The notion of a 'team' in real life is a very flexible one, and as soon as we try to represent it using a concrete data structure, we're bound to run into problems. The questioner shouldn't be blamed for thinking a team and a list of players are one and the same - there are many real life examples in which the two are used interchangeably. If anything, this highlights the challenge of OOP: real life objects and their relationships are just really difficult to model in a deterministic way.