Anchor: WordPerfect and Netscape work just fine on my Windows-based machine.
Entailed: Windows is an acceptable platform for WordPerfect and Netscape.
Contradiction: Windows is the worst platform on which to run WordPerfect and Netscape. 
Contradiction: Dave stood completely silent, unable to come up with any words.
Contradiction: Two people are getting haircuts.
Contradiction: I only did it once or twice, so it took me a while to think about it.
Contradiction: People together in front of a building.