ok, so does this make any sense;

all ravens are black right?
so if you see a raven, it will always be black.
so if the bird infront of you isn't black, it isn't a raven.
so; all non black bird's are not ravens..
this ofcourse is correct.. but the paradox is;

The statement "all ravens are black" is logically equivalent to the statement "all non-black-things are non-ravens"

so all non red things are not strawberries..