Premise:
"I kept a kind, knowing half-smile active at all times."
Hypothesis: I was always half smiling at work.

it is not possible to tell

Premise:
"There was no more gambling, prostitutes were arrested, and men and women were segregated in the public bathhouses, with naked government spies to enforce the (short-lived) new rules."
Hypothesis: Gambling, prostitution and mixed-sex public bathhouses were all banned.

yes

Premise:
"It was built right over St. Peter's tomb and reserved exclusively for the pope's mass."
Hypothesis: It was built of St Peter's tomb and only used for the pope's mass.
yes