If letting someone handle the controls counted as instruction, so, logically, would:
Explaining how the aircraft worked, while you're in flight.
Talking through a take-off, landing etc.
Suggesting an airsick passenger put their hands lightly on the stick/yoke, look out the front, and imagine they're flying (while you still fly it of course).
There may or may not be a rule, but maybe a little common sense is required here?
