Premise:
"Certainly celebrating it isn't."
Hypothesis: One should not celebrate it.

yes

Premise:
"it's a little bit nicer to have a Spring and a Fall season where you have some pleasant weather everyday where you can feel like you just want to open your windows and"
Hypothesis: Having a Spring and a Fall would be the worst, I'd close my windows and hide from the weather.

no

Premise:
"Western countries and Nigerian opposition leaders implored the military to use Abacha's death as an opportunity to restore civilian democracy."
Hypothesis: Western countries and Nigerian opposition leaders saw an opportunity to restore democracy.
yes