Not only are not all things demonstrated, but it may even be demonstrated that some things are indemonstrable.
Such immediate or indemonstrable judgments, it is said, abound in our experience.
Of the self-subsistent definition is οὐσίας τις γνωρισμός54 by exposition of genus and differentia.55 It is indemonstrable.
indemonstrable, in-de-mon′stra-bl, adj. that cannot be demonstrated or proved.
All are indemonstrable and cannot be less sure than the body of doctrine that flows from them.
But these indemonstrable principles are appeals to intuition, synthetic judgments a priori.
Like all ultimate postulates it is indemonstrable; Mill's derivation of it from Experience did not amount to a demonstration.