You can speak of say, the legality in another person's action, can't you?
Morality is merely a dictate of moral law.
Of course there is - one who adheres to the teachings attributed to jesus the christ.
Ah, but not all avenues of inquiry in science and math are defined in their entirety.
But that doesn't stop us from using them, does it?
Metaphysics is the study of the nature of existence.
One of the most important standards of existence is immutability.
Metaphysics is anything but 'amorphous and vaporous'.
In metaphysics, matter has a fluid existence - hence not existence in its truest sense.
A human being, on the other hand, while having a material 'existence', also has will.
A person is always viewed within this duality.
The universe is made up of mostly 'dark energy' - which isn't like the energy we know of. Its got one foot firmly set in pure speculation.
The good thing about philosophy is that it isn't bound exclusively to empirical phenomenon. It operates on logic alone.
And when one speaks of 'animate and inanimate' in the metaphysical sense, it only means the existence of will.
How can mathematics be a mental construct when it is absolutely independent of subjectivity, eh?
The physical universe, to some extent, may be described both quantitavely and qualitatively. What is that if not a statement of distnctness?