Premise:
"23 Competitors understand clearly that 15-ounce pieces of saturation mail can be carried privately for less than Standard-A rates, while 4-ounce pieces cannot."
Hypothesis: 15 ounce pieces of mail could be shipped more cheaply by private carriers.

yes

Premise:
"I did likewise, and we drove up within three minutes of each other."
Hypothesis: We drove up about a half hour apart, because I was busy.

no

Premise:
"well what have you seen"
Hypothesis: You haven't seen anything.
no