Philosopher Ludwig Wittgenstein in his theory of Language-games contends that people, as they communicate, are playing games with one another. The words a sender uses, the sentences that are thus formed have an ulterior motive. The recipient can only understand what is said if he understands what "game" the sender is actually playing. For example, when a parent warns a child – “Do not enter that room, there is a ghost.”, the parent isn’t stating any fact. He simply does not want the child to go in there. He is therefore playing a game of fear with the child. Thus humans, with the use of language, keep playing games with one another.