Premise:
"While accusing Clinton of invoking the Iraq conflict to delay the impeachment vote, Republicans invoke the Iraq conflict to expedite the impeachment vote."
Hypothesis: The Republicans are being hypocritical and inconsistent by invoking the Iraq conflict.

yes

Premise:
"After various questions on other matters, Mr. Philips asked: "In the month of June last, do you remember a parcel arriving for Mr. Lawrence Cavendish from Parkson's?" Dorcas shook her head. "
Hypothesis: There were no packages delivered to Mr. Cavendish in the month of June.

it is not possible to tell

Premise:
"He turned to look in a mirror, and caught sight of the barber handing the bottles and jars of waste hair and nail clippings to a girl."
Hypothesis: He had rarely seen this sight before, and found it unexpected.
it is not possible to tell