Anchor: Piero della Francesca's celebrated Montefeltro Altarpiece (1474) is his last work.
Entailed: Piero della Francesca made his last work in 1474.
Contradiction: Montefeltro Altarpiece was Piero della Francesca's first piece of work.
Contradiction: A chain of evidence goes from conclusion to observation. 
Contradiction: The rooms rival the expensive hotels around it.
Contradiction: It is nine o'clock where I am
Contradiction: There are people playing basketball.