INTRODUCTION of "Second Person: Role-Playing and Story in Games and Playable Media"

How should we explain to someone what a game is?

I imagine that we should describe games to him, and we might add:

"This and similar things are called 'games'." Ad do we know anymore about it ourselves? It is only other people whom we cannot tell exactly what a game is?

But this is not ignorance. We do not know the bounderies because none have been drawn.

- Ludwig Wittgenstein, Philosphical Investigations, aph. 69.