Question:
Based on the premise "Because these changes occurred in 2000 and 2001, it is too early to determine how effectively they will be put into practice.", can we conclude that "The year 2000 saw no changes. "?
****
Answer:
no

Question:
Based on the premise "Today, the memory of Psychic Friends would live on in all our minds as a great and kooky American success story; we wouldn't have hundreds of psychics worried about their futures; and Lasky would still be ridiculously wealthy.", can we conclude that "We all remember Psychic Friends as a great success story."?
****
Answer:
yes

Question:
Based on the premise "Nitrates can play a larger role in visibility problems in some portions of the West than in the East.", can we conclude that "The West does not have visibility problems due to nitrates."?
****
Answer:
no