Anchor: The version of Linux that comes in Mastering Linux offers no technical assistance, but Red Hat's version 5.2, which costs $39.
Entailed: Linux doesn't offer technical assistance.
Contradiction: Linux does offer technical assistance.
Contradiction: EAT!
Contradiction: A person looking for help.
Contradiction: The man is playing the trumpet for the crowd.
Contradiction: There was a discussion about  Congress' object and purpose.