Premise:
"This was a man I knew well."
Hypothesis: The man had been well known since 1997.

it is not possible to tell

Premise:
"With fine hotels and fashionable boutiques, Courmayeur's lost innocence is easily captured in Entryves, its quiet, little-sister neighbor 3 km (2 miles) to the north."
Hypothesis: Courmayeur has a neighbor to its north.

yes

Premise:
"A key difference between measuring the nation's saving and gauging a household's finances is the treatment of changes in the market value of existing assets."
Hypothesis: There is a difference between measuring the nation's saving and gauging a household's finances.
yes