Premise:
"Jacob is just plain wrong."
Hypothesis: Jacob has never been incorrect in his entire life.

no

Premise:
"Julius's narrative style, if not strictly accurate, was picturesque! "
Hypothesis: Julius' narrative style was difficult to understand

it is not possible to tell

Premise:
"In the very dim light Drew could just make out that the Texan was holding his gloved hand to his mouth, puffing at the crooked fingers."
Hypothesis: The Texan was puffing at his fingers frozen from the temperature outside, trying to warm them up.
it is not possible to tell