Premise:
"i bought mine a year ago so i'm not buying a car any time soon"
Hypothesis: I bought my car about 10 year ago, it's time start looking for a new one.

no

Premise:
"To be a New Hollywood director was to flirt with hubris."
Hypothesis: New directors in Hollywood are always humble and have no egos.

no

Premise:
"So why persist in newspaper reading?"
Hypothesis: Why continue reading the newspaper?
yes