Anchor: Vendors are selling their wares at an open market.
Entailed: vendors are selling
Contradiction: the vendors are off duty at home
Contradiction: Tuppence is friendly and never speaks in a dark tone. 
Contradiction: You know that you need a lot of special tools to be able to do that.
Contradiction: The sky was as calm as ever, and the dome wasn't about to move.
Contradiction: The town is fortified and in a hill.