The language here of "exist" is, I think, a bit of a rhetorical trick which doesn't argue the actual thing under contention. That's not to say that there aren'

The language here of "exist" is, I think, a bit of a rhetorical trick which doesn't argue the actual thing under contention. That's not to say that there aren't good and convincing actual arguments, I just don't think this is one of them.