Re: Diagnostic hammering..
The equivalent here would be scramming the reactor and right after that the motors re-latching and pulling the control rods on their own, again. And again. And again. Rinse, lather, repeat. That isn't taught as it should be impossible, not just improbable, although I use impossible advisedly.* Nothing in the training covers that. Now I know, because I can draw the whole damned plant from memory to have the circuit breakers tripped thus removing power from the motors. However, for those pilots, they weren't aware of MCAS and it's instrumentation. Don't know means don't know. How, exactly were they supposed to disable MCAS?
* -If you really, really know you theory, there's some impossible things that can happen in certain regimes that are very remotely possible. This isn't one of them.