Premise:
"Just come off night duty. "
Hypothesis: Just started my shift,

no

Premise:
"The issue date and effective date of each statement are presented first."
Hypothesis: The issue date and effective date are listed first for organizational purposes.

it is not possible to tell

Premise:
"Consequently, the Army can eliminate its weakest candidates--about one-half of blacks and one-third of whites--and still have a large number of blacks--about one-third of the Army."
Hypothesis: The Army has only Asian-Americans.
no