It's not that the force must be positive. It's the the force must be consistantly increasing up to the stall as well. Without MCAS, the problem is that the forc

It's not that the force must be positive. It's the the force must be consistantly increasing up to the stall as well. Without MCAS, the problem is that the force does not continue to increase to the stall point. It does stay positive at all times.