Premise:
"Funny that those noises which they had heard before had not had significance earlier."
Hypothesis: The noises they heard earlier wasn't important at that time.

yes

Premise:
"In the cities, the cathedrals, palazzos, monumental public buildings, and open-air piazzas are planned as if harmonious elements in unrivalled stagesets."
Hypothesis: The cities have impressive public buildings.

yes

Premise:
"Regulations should not be seen as roadblocks, but as support orbacking to achieve the agencies' mission."
Hypothesis: Regulations try to support the agencies' mission.
yes