It was akin to me asking you, "If I lose an engine below Vmcg can I attempt a takeoff anyway?"
Come on...be serious, it's not the same kind of question, above all if you read that I was looking for sections of manuals or something written to support the misleading statement of Boeing's Limitation section of the AFM.
It was curiosity, search for something I was, probably, not able to find.
The concept is clear: it's not a great idea to fly above 20000 feet with flaps extended.
The curiosity: Had Boeing set such a limitation in any manual as I don't know if I'm missing it?
It's really, reaaaaally different from stating that I don't know or, worse, I'm willing to fly that way.