Premise:
"Rennie ought to cut losses and give that kid the boot."
Hypothesis: Rennie really should just fire that kid.

it is not possible to tell

Premise:
"And perhaps that was an over-calculation."
Hypothesis: The calculation was probably wrong.

yes

Premise:
"But even if you don't want to spend hours admiring the art collection, the building itself ' a former home of France's kings ' has much to offer and, if you plan your visit well, it is sure to be enjoyable."
Hypothesis: The museum building used to be the home of a kind.
yes