If I like it, it's mine.
If it's in my hand, its mine.
If I can take it from you, it's mine.
If I had it a little while ago, it's mine.
If it's mine, it must never appear to be yours in any way.
If I am doing or building something, all the pieces are mine.
If it looks like mine, it is mine.
If I saw it first, it's mine.
If you are playing with something and you put it down, it automatically becomes mine.

If it's broken, it's yours.