Question:
Based on the premise "Nominal declines aggregate household postage expenditures.", can we conclude that "Increasing costs have led to a drop in household postage expenditures."?
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Answer:
it is not possible to tell

Question:
Based on the premise "After dinner, he announced, "I shall go right away and see Jane."", can we conclude that "He planned to visit Jane right after dinner."?
****
Answer:
yes

Question:
Based on the premise "have you been involved on the switchboard long", can we conclude that "How long have you worked on the switchboard? "?
****
Answer:
yes