instruction:
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.
question:
Sentence 1: This is a simplification of reality, which probably involves a curve with a slight upward slope. Sentence 2: In reality, it's probably a 20 degree upward slope.
answer:
no

question:
Sentence 1: Jon spoke again, nodding his head slightly. Sentence 2: He was trying to convince them.
answer:
no

question:
Sentence 1: However, the relative roles of PM exposure duration and PM exposure level in inducing premature mortality remain unknown at this time. Sentence 2: A high duration of exposure to PM relative to a relatively low level of exposure is known to induce premature mortality, and this has been explained in numerous studies.
answer:
yes