Premise:
"In Havana, the government newspaper Granma celebrated the 40 th anniversary of the invention of the cha-cha with the unlikely boast that it was danced by no less than Queen Elizabeth and the Prince of Wales."
Hypothesis: The cha-cha is at least 40 years old.

yes

Premise:
"And the track record of pop science enthusiasms is uniformly dismal."
Hypothesis: Track record of pop science enthusiasms is dismal

yes

Premise:
"If pushed for time, the must-sees are, in order of importance, the Harem, the Treasury, and the Pavilion of the Holy Mantle."
Hypothesis: The Treasury is still used as a treasury to this day so you must see it.
it is not possible to tell