Premise:
"To address these risks, many of which did not exist prior to extensive use of networks, electronic mail, and the Internet, the organizations had begun placing"
Hypothesis: Many risks existed long before networks did.

no

Premise:
"yeah twenty four hours"
Hypothesis: Yes, twenty-four days.

no

Premise:
"The House of Quality on Hebron Road and the Jerusalem Artists' House on Shmuel Hanagid Street are the most famous; also try the New Cite"
Hypothesis: The House of Quality and the Jerusalem Artists' House are the most famous.
yes