Premise:
"And celebrate your intermediary successes along the journey."
Hypothesis: Your successes along your journey should be celebrated.

yes

Premise:
"Does the Pentagon believe there are unknown defectors?"
Hypothesis: Does the Pentagon not believe there's unknown defectors?

no

Premise:
"Tuesday night, Scheck himself was billed as a guest, but he never appeared."
Hypothesis: Scheck did not show up on Tuesday night.
yes