Premise: If it doesn't wake up soon, another scandalous case will inevitably surface, and the government will take matters into its own hands.

Hypothesis: The case would only open up into a whole different set of issues.
Answer: it is not possible to tell

Premise: Above the first 20 billion pieces, less attractive mail begins to presort and the postal service's costs at the margin undoubtedly begin to increase.

Hypothesis: The postal service's costs will always decrease.
Answer: no

Premise: He sailed immediately for England.

Hypothesis: He sailed to England on an ocean liner.
Answer: it is not possible to tell

Premise: They continued to sit in silence.

Hypothesis: They stood around yelling at each other.
Answer: no