Yes we have and we know it doesn't work this way. You can refer to the HERO lessons and what Bramon told MC about copying powers. Also I fail to see the point of removing someone's brain physically. If you can do that then you can easily kill them why bother removing their power.i mean we have never really been told how power in general works and every power works differently soooo. and i don't mean using powers to change their memories i mean their physical brain and change the memories part not just injecting your power to block memories but removing the memories entirely by moving a small tentacle into their brain and removing the part of the brain that has the memories then replacing it with another persons brain part to make them think certain things.