Anchor: However, he quickly realized that from time to time he needed to prepare a presentation, and unfortunately, as was the case with some of the most important issues, had to do it by himself.
Entailed: He quickly realized that from time to time he needed to prepare a presentation.
Contradiction: He never realized that from time to time he needed to prepare a presentation.
Contradiction: I have one son. 
Contradiction: two dogs are running
Contradiction: They are at pizza Hut birthday part as clowns
Contradiction: You can attend parties with music, dancing, and stories in the evenings at the Caledonian Brewery.