Anchor: The culprit is indoor air, which is filled with dust mites, cigarette smoke, cockroach remains, and pet dander.
Entailed: Indoor air contains dust mites, remains of cockroaches, pet dander and cigarette smoke.
Contradiction: Indoor air is the purest of all the airs and contains no toxins.
Contradiction: All is forgiven. 
Contradiction: Yes, but not a real fight. 
Contradiction: Two boogers laugh and smile.
Contradiction: There are two men.