If we take the phrase my idea was stolen! literally, then yes, yours is the conclusion we would reach. But the sentiment behind the phrase is more like, the oth

If we take the phrase my idea was stolen! literally, then yes, yours is the conclusion we would reach. But the sentiment behind the phrase is more like, the other player cheated by cribbing off your notes; they did not have to invest the labor/time/money you did, and that isn't fair.