I've been wondering if this is true after researching the effects and changes on the brain that damage can do. Is it possible that an ISFp could of been an ESTj if the injuries never occurred? I wonder if the changes are slight and only transform one scale. It can possibly transform the entire personality to a point where several parameters are different. If brain damage occurs, is it more likely for an INTp to change to an ISTp or INFp, or can the individual possibly mutate into an ESFj?