Premise:
"New Silicon Valleys have sprouted in places such as Boise, Idaho; Cambridge, England; and Bangalore, India."
Hypothesis: Silicon Valleys only exist in big American cities that have great universities.

no

Premise:
"and so you know he has these stacks of Sunday newspapers that go unread unless"
Hypothesis: There are certain conditions where some Sunday newspapers go unread unless something happens.

yes

Premise:
"I'm looking at ways to raise salaries."
Hypothesis: I am determined to find a way to slash salaries.
no