He is able to fully 'comprehend' [=understand completely] what is happening and react appropriately.
I find his attitude impossible/difficult to 'comprehend'.
They are unable to 'comprehend' what had happened.
(..) act yet. But when this is done... when it's finished... it's going to be... People will barely be able to comprehend. But they won't be able to deny. Could the freak be more vague? As far as master plans go... I really can't wait for you to see. It's going to be something. (..)1995 Se7en