Premise:
"Bush's campaign rationale is that he'll keep America strong and make Americans proud."
Hypothesis: Bush said publicly he wants to make Americans proud because that would mean being a good leader.

it is not possible to tell

Premise:
"Despite a lineup of big-name talent--including Roy Lichtenstein, Jeff Koons, and Claus Oldenberg--the world's most prestigious contemporary art exhibition fails to excite."
Hypothesis: Koons' work does not appear in the exhibition.

no

Premise:
"It is a common belief that the Private Express Statutes and the mailbox rule serve as protection to allow universal service at uniform rates."
Hypothesis: The Private Express Statutes have no affect on universal service at uniform rates.
no