It's brass monkey weather today, isn't it?

A proposition is scientific if and only if it is falsifiable. This is the criterion or principle of falsifiability. Falsifiability must be distinguished from falsity, of course.

What my parents served me from that very same stewpot was chicken.

Judging by the collection on her laptop, she had a taste for porn that rivaled mine, though her collection was mostly in the form of rather grainy vidcaps...