Good! Yes, of course. I assumed that ambiguity would come up sooner or later, so it's good you've brought it up. People often talk about "a mass" when what they really mean is "an object with mass". Objects are made out of matter, so "a mass" is a euphemism for an object made from matter. But that's not the problem that arfa brane is having here. arfa seems to think that "mass" is something inherent in an object, rather than just being a number with units that we associate with an object. Yes, you could say that, but x would still be a number with units, which would be "the mass of the object". The point is: the mass of an object is a number. You and I agree on this. arfa begs to differ. No! See above. Mass is a quantifier of matter. Strange. You started with what sounded like the right concept, but by the end of your post you'd gone completely off the rails, making the same error arfa brane has been making - confusing a property of a thing for the thing itself.