About this mail exchange:
1. What was ist that the first pilot had observed presumably in climb and the other in decent? Wasn't MCAS not supposed to activate within the regular flight envelope unless there was a faulty AoA sensor? If they had simulated a faulty sensor, he would have been told right after the sim session the latest. So what was going on?
2. How did Boeing get hold of this? Probably by sifting through archives after a criminal investigation was started. This is appears to be far less damning than a formal complaint to superiors.