Premise:
"If you're on a coach tour, you will probably stop at the excellent Ein Gedi Spa and get your chance to float on the Dead Sea."
Hypothesis: The Ein Gedi Spa is the only spa in the area that lets visitors float on the sea.

it is not possible to tell

Premise:
"i work at the Lewisville site"
Hypothesis: I don't work at the Lewisville site.

no

Premise:
"No, my dear sir, you asked if anyone of the name of Jane Finn had been there."
Hypothesis: That's correct; I don't remember you asking me about Jane Finn.
no