Say what? Switzerland isn't in the EU, how can it leave?

It has treaties, but not membership. That doesn't make it "leaving" if they annul the treaties.

This was the OP:

> It wouldn’t be full Chexit. Just renegotiating and then rejecting the Schengen chapter. It would then be up to the EU to execute its Guillotine clause.

My terminology was matching what was used here.