Premise:
"In cases where space for this ductwork was extremely limited, the air preheater was relocated."
Hypothesis: The air preheater was relocated if the space for the ductwork was very small.

yes

Premise:
"And though Bill Clinton proves that people will elect presidents who feel their pain, still I think Weisberg is close to the mark on this point."
Hypothesis: Bill Clinton is proof that people vote for people who are better than them.

no

Premise:
"You'll find Vicenza's greatest opus (his country villas were another story) where the Corso widens out into the Piazza Matteotti to give him more freedom for the wonderfully airy Palazzo Chiericati."
Hypothesis: Vicenza's country villas are regarded as travesties.
it is not possible to tell