A61-year-old pastor, rev. parks, has a stroke and takes a leave of absence from his job while he recovers. after 5 or 6 months, he tells his doctor that he feels well enough to go back to work. when he begins his job again, he goes back to his usual duties: preaching sermons on sunday mornings, teaching bible studies, visiting church members who are sick, and others. rev. parks says that he is "100% back"; however, his parishioners and family notice some subtle problems. for example, he tends to bump into people who walk on his left; when he writes, he does not use the left side of the page. he does not recognize parishioners he has known for 20 or more years until they begin to speak. when people tell jokes, he does not laugh or appear to understand the jokes as he used to. he does not detect sarcasm in other people's speech. rev. parks probably has