Anchor: Trainers calculate how their Pokemon's talents match against rivals, a fiendishly complicated task that requires mastering and manipulating information about every monster--a 151-variable algebra problem.
Entailed: The system that trainers use to calculate their Pokemon's talents is complicated.
Contradiction: Trainers do not match their Pokemon against those of their rivals.
Contradiction: He messed up both national and international TV.
Contradiction: Information technology carries a high rate of return.
Contradiction: Shops welcome customers at 11.00 a.m. and shut at 5.00 p.m. 
Contradiction: In 1998 retirees and employees lacked pension income and pension plans respectively.