Premise:
"But he played an important part in bringing realism to child rearing by being an unapologetic improviser himself."
Hypothesis: He was an unapologetic improviser.

yes

Premise:
"The size of this figure would depend on how much the shift volume grows after it leaves the basic category."
Hypothesis: Projections indicate that the figure will probably change by a small amount.

it is not possible to tell

Premise:
"Presentation to the Clean Air Science Advisory Committee."
Hypothesis: Presenting to the clean air science advisory committee
yes