Premise:
"It was on his card."
Hypothesis: His card is where it was at.

yes

Premise:
"Most other towns in Portugal, while offering a reduced roster of low-key bars, tend to be rather quiet at night."
Hypothesis: Many local taverns offer good conversation opportunities with residents.

it is not possible to tell

Premise:
"Many people continue to be exposed to unacceptable levels of smog."
Hypothesis: The amount of smog is still too high in areas where many people are exposed.
yes