Premise:
"The tower is just over 18 m (60 ft) high, one for each year of Victoria's rule at the time of her Jubilee."
Hypothesis: It was built in Victoria's time of rule.

it is not possible to tell

Premise:
"well um how long do you cook the meatballs"
Hypothesis: I know how long to cook meatballs for.

no

Premise:
"It wasn't fair."
Hypothesis: It was an injustice, and there is no recourse for it.
it is not possible to tell