Premise:
"The Huntington Library,Art Collections and Botanical Gardens comprise a 207-acre (84-hectare) estate once owned by railroad tycoon Henry E. Huntington."
Hypothesis: The Huntington Library is outside of the 207-acre estate.

no

Premise:
"The simple rule is, if in doubt about what to do, then check it out both from a technical and value oriented perspective."
Hypothesis: If in doubt about what to do, refer to the rule.

yes

Premise:
"right especially to to pay that kind of money for it"
Hypothesis: Yes, especially if you're receiving that much money for it.
no