indemonstrable

American  

[in-di-mon-struh-buhl, in-dem-uhn-] / ˌɪn dɪˈmɒn strə bəl, ɪnˈdɛm ən- /

adjective

1. not demonstrable; incapable of being demonstrated or proved.

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indemonstrable British  

/ ˌɪndɪˈmɒnstrəbəl /

adjective

1. incapable of being demonstrated or proved

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Other Word Forms

• indemonstrability noun
• indemonstrableness noun
• indemonstrably adverb

Etymology

Origin of indemonstrable

First recorded in 1560–70; in- ³ + demonstrable

Example Sentences

For instance, the whole of Arithmetic and Algebra has been shown to require three indefinable notions and five indemonstrable propositions.

From Mysticism and Logic and Other Essays by Russell, Bertrand

If we leave this ground of experience, they become mere fictions of thought, the possibility of which is quite indemonstrable; and they cannot, consequently, be employed as hypotheses in the explanation of real phenomena.

From The Critique of Pure Reason by Meiklejohn, John Miller Dow

Wherefore in speculative matters a demonstrative science is said to exercise judgment, in so far as it judges the truth of the results of research by tracing those results back to the first indemonstrable principles.

From Summa Theologica, Part II-II (Secunda Secundae) Translated by Fathers of the English Dominican Province by Thomas, Aquinas, Saint

It is not everything that can be proved, otherwise the chain of proof would be endless; you must begin somewhere, and you must start with things admitted but indemonstrable.

From The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield by Livingstone, R.W.

But wisdom draws conclusions from indemonstrable principles which are the object of the virtue of understanding, even as other sciences do.

From Summa Theologica, Part I-II (Pars Prima Secundae) From the Complete American Edition by Thomas, Aquinas, Saint