Premise:
"and and different circumstances call for different things"
Hypothesis: Different circumstances call for different reactions, if you hit me I'll hit you back.

it is not possible to tell

Premise:
"MR. CHU WAS A PROFESSIONAL STAFF MEMBER OF THE POSTAL RATE COMMISSION FROM 1993-1995."
Hypothesis: Mr. Chu was unemployed during the year 1994.

no

Premise:
"but we we i did that i let the kids have a pet because i wanted them to have practice in caring for someone else and you know not being so selfish"
Hypothesis: The kids have a pet to learn nurturing skills.
yes