Anchor: He spent the first 15 minutes of the seminar making certain that all present understood how hard it was to do well.
Entailed: He spent several minutes making sure that everyone knew how hard doing well is. 
Contradiction: He spent no time explaining that doing well is almost always hard work. 
Contradiction: Congress has never made changes to the LSC Act. 
Contradiction: If I owned a car.
Contradiction: I meant that if software developers were doing their jobs, word processors would have never been made.
Contradiction: Dave Thomas was the designer of the course.