Anchor: She returned with a tray, containing the teapot and four cups.
Entailed: She'd come back with tea for her guests.
Contradiction: She'd never returned after offering her guests tea.
Contradiction: Zarco had been traveling to Porto Santo when he was blown off course and shipwrecked in the Lesser Antilles.
Contradiction: You can walk to some but have to drive to others.
Contradiction: Tuppence went to make tea at 8 o'clock 
Contradiction: We have never needed one of those.