Bill Denton wrote:

But if an airfoil has two states, stalled or flying, how can you land
without a stall?

It doesn't have just two states. It can be moving too slowly to be flying
without being stalled. As has been posted several times, it is not stalled
unless the airflow over the upper surface of the wing has separated from it. As
has also been posted, that will not happen without an excessive angle of attack.

George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to have
been looking for it.