Given the task definition and input, reply with output. 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.

Sentence 1: Normally, under fast pay procedures, all invoices are examined subsequent to payment authorization. Sentence 2: Invoices are never examined before nor after payment authorization
yes