Premise:
"With Oriental and Byzantine decorative elements reflecting the Pisan Republic's overseas interests, its four-tiered arcaded facade over three porches is a masterpiece of grace and delicacy."
Hypothesis: The main influences of the Pisan Republic were from Oriental and Byzantine empires.

it is not possible to tell

Premise:
"What made you think he'd ceased to take any interest in the case? asked Tommy curiously."
Hypothesis: Tommy asked a question.

yes

Premise:
"These case studies were intended initially as stand-alone assessments of the programs but were brought together to learn about the effectiveness of the evaluations themselves in the context of educational programs (Searle, 1985)."
Hypothesis: These case studies were not intended to initially stand-alone.
no