We don't have enough evidence to say for sure.
A: Because their eggs stink. (They're extinct)
It doesn't matter.
I'm not sure, but I know
A person who stays up at night, wondering if there's a dog.
Because the evidence was under their noses (They sniffed the cocaine)
Because they carefully and objectively reviewed the evidence from the trial and thought a legitimate injustice had been done.
Someone who stays up all night wondering whether or not there is dog.
You stay up all night wondering if there is a dog.