Ok, so I know one of aims of Metaphysics is to encode these fundamental truths, by way of example, primarily via Aristotle. So, you have things like The Law Of Identity, in that anything is equal to itself, and The Law Of Non-Contradiction, something either exist or does not (nor partially, as stated by The Law of Excluded Middle).
However, with such truths being paradigmatically Metaphysical, what of other truths, like Newtons laws? So would the law that states that 'every action, there is an equal and opposite reaction', be considered Metaphysical? What of Descartes Cognito Ergo Sum? i.e 'I think, therefore I am'. Is that Metaphysical?
In comparing what definitely is a metaphysical truth (Aristotle's Laws), I suppose it would also help to declare truths that are obviously are not, for instance, 'My name is Illuni Cocomoso', or, 'Ducks exist'. The primary difference here is that it doesn't seem necessarily true, e.g all ducks may not exist in all possible worlds (a depressing thought indeed). A second distinction is that of universality, so Aristotle's laws are universally applicable to everything in existence, but not everyone is called Illuni Cocomoso.
So is it that necessity and universality is thee criteria for a Metaphysical truth? Or is there some other criteria which is also necessary, where when combined with the criteria of necessity and universality, is sufficient enough to be deemed a Metaphysical truth?