Nyal Williams wrote:

"One more thing: Outward ailerons will flatten the spin considerably which
doesn't help on recovery."

What does that mean?

First it probably means bad terminology. Second, it means that the pitch
attitude of the ASK in the spin depends on aileron position. Play enough
with the ailerons and you will find yourself in something like a flat
spin which may be reluctant to recovery. But you can always continue to
play with the ailerons until you'll find yourself in a normal spin again.