Anchor: Cells in mature animal tissues are not, as we had thought, irreversibly differentiated.
Entailed: We used to think that cells in mature animal tissues are irreversibly differentiated.
Contradiction: We have confirmed our belief that cells in mature animal tissue are irreversibly differentiated.
Contradiction: I'm really glad I can understand Cuban Spanish. 
Contradiction: Specimens are being examined in a laboratory.
Contradiction: The lone man stared at the White House.
Contradiction: You're on LOA?