Premise:
"The use of these procedures regarding rules pertaining to nonroad engines or vehicles is mandated by section 307(d)(1)(R) of the Clean Air Act."
Hypothesis: Section 307(d)(1)(R) of the Clean Air Act contains no provisions concerning nonroad engines and vehicles.

no

Premise:
"Messinger can't break Giuliani's stereotype, or break out of her own."
Hypothesis: Messinger's stereotype was that she would like watermelon.

it is not possible to tell

Premise:
"But while creativity may exist, it doesn't necessarily exist over and over again."
Hypothesis: Even though creativity may exist, it doesn't mean it will keep existing over and over again.
yes