Anchor: But poetry is a rough business, requiring eternal optimism about the possibility of publication, even if gloom is considered the Proper Poetical Stance on most other issues.
Entailed: Poets must have an eternal optimism about the possibility of being published. 
Contradiction: The Proper Poetical Stance on most issues is to be incredibly upbeat. 
Contradiction: The hat maker is selling purple hats.
Contradiction: There is a step higher than "large."
Contradiction: A boy wearing a jacket holds up a puppy.
Contradiction: Special nozzles aren't usually required.