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neither do slats once they have gone beyond maximum angle of attack and stalled........
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Right, they don't fly to the moon either despite being an anti-spin device.
What that has to do with anything, I don't know. Maybe it is significant in your mind?
What they do is energize the boundary layer by increasing the high energy turbulent portion so that stall is delayed significantly compared to plain airfoil.
Twisting on the otherhand, simply moves the angle of incidence a few degrees.
Go back a few pages and look over the definition of "spin resistant airplane".
Maybe the light bulb will come on for you and maybe not?