In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.
Q: Sentence 1: Pour coffee into Christopher Hitchens until he's sober enough to finish his cover story, 'Friendship. Sentence 2: Hitchens is not always sober.
A:
yes