Anchor: The congregation had written to congratulate him about something or other (unspecified by the notes), and Washington 
Entailed: The congregation had written a letter of congratulations.
Contradiction: The congregation had written a letter of sympathy.
Contradiction: People are throwing flags on the ground and setting them on fire.
Contradiction: There are two important features.
Contradiction: Everything was silent.
Contradiction: Linux does thorough testing since they stand on the shoulders of giants.