I said if they slow down due to turbulence, it may not save any fuel cos they may have to reduce altitude when they slow down and air is denser thus more drag... that is when you got all "I'm a PILOT I AM GOD!!! YOU KNOW NOTHING"
The reason the plane cannot hold altitude is a decision to reduce speed. As was pointed out in "Ask a pilot" the speed reduction is typically quite small. Unless turbulence is severe according to the OTHER pilot, speed is not reduced.
Sure they can climb, but that is an alternative option to flying through the turbulence. Of course finding smooth air is always an option. Geez. It all depends on orders of magnitude. If they slow down a tiny amount they don't have to do anything, and it also depends on the load of the plane. You are trying to say that I claimed they only have one course of action. If they slow a lot and have to reduce altitude, fuel burn will probably increase depending on the speeds and altitude involved.
:crazy: