TT - I think you hit the nail on the head when you go down the lawyer route.
I'm not seeking to get into more arguments but speaking for myself I'm less interested in how the lawyers might react and more interested in being safe.
In the end - and using the example here as it was the context of the thread - I don't think it is terribly difficult to understand what was required or expected.
Have you flown in the last 90 days? No
Am I flying alone? No
Is the person in the aircraft an instructor? No
Am I P1 or is he P1? .......
I mean OK you can dance around this with a variety and try and be smart with words. In the end that AAIB report suggests there were some serious injuries. That is tells you all you need to know.