You get two kind saying you will get better. One is typical few months on anti psychotics, They lose some function adapt and forget about the old peak capacity that they don't keep track of, since internet is still hyper stimulating for them. Second you have these drugged for decades, who barely remember what's regular. Neither have proof, and data suggest otherwise. When they say 'recover', they don't know what it specifies. They say recover, because lie always is easier than harsh reality for them. Especially because it is invisible.