Thanks for posting.
My approach (and I have been through a couple) was to play dumb.
So, it is a variation on the asking questions approach, except the purpose is to act stupid.
“I don’t understand what you said.”
“Please explain—this is confusing.”
Act baffled.
Pretend you are in a grad student seminar on Topology or Nuclear Physics.
and the professor is speaking in German!
Strain to listen, and then repeat:
“I am still confused. What are you saying?”
“What am I supposed to say?”
“What am I supposed to do?”
“When is this supposed to happen?”
“One more time, so what are we doing here?”
“Is it not a lie if you truly believe it?”
No accusation, but a heck of a precipice.
I have used a similar approach, ask dumb question that take a few choice words or phrases they used and take those entirely out of context, make them try to explain it differently and repeat as necessary.