shroedinger's chair

that chair is mine.
isn't it?
isn't that my chair?
that isn't my chair.
that chair isn't mine?
mine isn't that chair.
mine that chair isn't.
is not that chair mine?
not that chair, isn't mine.

what do you mean, i don't have a chair?
what, do you mean i don't have a chair?
don't i have a chair?
i do have a chair.
i have a chair.

that chair is mine, don't "isn't" me, meanie.