Premise:
"In his 1975 book, The First Casualty , Phillip Knightley examines this picture and its history at length."
Hypothesis: Phillip Knightley examined this picture and its history in his best selling 1975 book, The First Casualty.

it is not possible to tell

Premise:
"(Could there be any other real answer?)"
Hypothesis: (Could another answer be possible?)

it is not possible to tell

Premise:
"Arts and crafts are held in high regard in Edinburgh."
Hypothesis: Edinburgh enjoys arts and crafts.
yes