Premise:
"right right not just overhead"
Hypothesis: Overhead is not the only thing.

yes

Premise:
"News notices the little-noticed white urban underclass."
Hypothesis: The news should be taking notice of the lowest class.

it is not possible to tell

Premise:
"It was the first of many times that the Fort of Eidyn would change hands between the kingdoms of the north and the south."
Hypothesis: Fort Eidyn was sent to both the southern kingdoms and the northern kingdoms several times.
yes