Question:
Based on the premise "With such a machine, we can run off a graph of the tides for years ahead.", can we conclude that "This machine can't help us to run off anything at all."?
****
Answer:
no

Question:
Based on the premise "Perhaps they had.", can we conclude that "Perhaps they hadn't."?
****
Answer:
no

Question:
Based on the premise "So how do the Republicans break through the Democrats' defense and carry the ball into the end zone?", can we conclude that "The Republicans can't pass any laws because of the Democrats."?
****
Answer:
it is not possible to tell