A spin is an event when one wing is stalled and the other is not
Errr... one might choose to disagree
A conventional spin
usually has
both wings stalled - however, the L/D characteristics beyond the stall lead to the autorotation (Lift and Drag curves in opposite directions).
One wing stalled and one not is used in a Flick Roll.
Overall - please do not read a pPrune thread on how to generically spin / recover or not
Recoveries can be very type specific, and the POH etc. should be well understood e.g. some types need a pause after the opposite rudder before stick forward, others you need to be careful of how much forward stick you might use to avoid an inverted spin etc. Some types are safe to spin at ~2500' (as in an aerobatic competition), others have a entry / recovery / abandonment calculation that might require ~8000' entry (Bulldog).
NoD