Premise:
"Continuing down High Street, you will walk past several stores selling highland dress and cashmere before you reach John Knox House, on the left side of the road."
Hypothesis: The John Knox House is located along a road with shops.

yes

Premise:
"The quaint carved figures of Calendura and Calendureta ring the hours and quarter hours, as they have done since 1759."
Hypothesis: It is located at the exact center of town.

it is not possible to tell

Premise:
"That way they will know that was the gift you wanted to give them."
Hypothesis: They will never be able to know that that was the gift you wanted to give them.
no