Premise:
"It can be seen that the total cost of providing postal service in the U.S. for FY 1999 was 20."
Hypothesis: There is no cost for providing postal service in the U.S.

no

Premise:
"yes i do i just got my certification huh-uh"
Hypothesis: I got my certificate in teaching

it is not possible to tell

Premise:
"4) Even if fiber doesn't prevent colon cancer, it does prevent other cancers and heart disease."
Hypothesis: Fiber does help with prevention of certain cancers.
yes