Natural Order and Science

[Harris]

Logic always starts from observable and intelligible objects

Yes, that was the point of the syllogism.

and then goes to metaphysical concepts.

You would need to prove that.

I had depicted a general view on how logic works. It always starts from intelligible objects however it may end in other observable object or in some metaphysical concept. It all depends upon what you are trying to explore by the use of logic.