Premise:
"If you have questions concerning the substance of the rule, please contact Victor S. Rezendes, Director for Energy, Resources, and Science Issues, on 512-3841."
Hypothesis: There is no one available to answer queries about the rule.

no

Premise:
"Critics line up on opposing sides."
Hypothesis: The critics form two opposing lines.

yes

Premise:
"A handful--the most researched is a tribe of Alaskan Inuit--have condoned affairs."
Hypothesis: None, including the Inuits, have ever been found to condone affairs.
no