Aerodynamic stability doesn’t mean it’ll automatically recover from a stall. It means that if it’s flying in a steady state and you perturb it, it will tend to

Aerodynamic stability doesn’t mean it’ll automatically recover from a stall. It means that if it’s flying in a steady state and you perturb it, it will tend to return to the original state. In a deep stall you can’t recover from, it’s because the aircraft’s stability is greater than its control authority, not because it’s unstable.