Well, it starts with enforcing law. When you say loud and clear to somebody if you're going to carry a gun illegally, we're going to arrest you. If you're going to sell a gun illegally, you need to be arrested. If you commit a crime with a gun, there needs to be absolute certainty in the law.
The law can be certain or uncertain at times.
the law can be uncertain or certain till you taken to court and proved guilty or not.
( z1 possible :ARG1 ( z2 or :op ( z3 certain :domain ( z4 law ) ) :op ( z5 certain :polarity - :domain z4 ) ) :frequency ( z6 at-times ) )