It's been maybe 15 or so years, so I'm similarly pretty far down the rabbit hole, but I definitely remember having a lot of trouble with:

  x = x + 1

At the time, it seemed patently obvious that it was a false statement, because there is no single value of x for which this is true.

If the situations are analogous, my guess would be that you would assume that each of these statements is an assertion, and that at least one of them must be false. Intuitively, I'd guess that it's the last one that people would assume would be false, because as you're reading from top to bottom, you've already "accepted" the first two.