CBP abilities can't be stopped by something played before it. (Like a prevent all or negate all.)
CBI abilities can't be stopped by something played after it. (Like an interrupt the battle or negate last.)
If you interrupt and then prevent an ability, you are essentially negating it. But don't go the other way, reading "negate" as "interrupt and prevent". If an enhancement is "cannot be prevented", you can still stop it with an "interrupt and prevent" or "negate" card.
