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Impossible to prove or demonstrate: a seemingly valid but indemonstrable hypothesis.

in′de·mon′stra·bil′i·ty n.
in′de·mon′stra·bly adv.


incapable of being demonstrated or proved
ˌindeˌmonstraˈbility n
ˌindeˈmonstrably adv


(ˌɪn dɪˈmɒn strə bəl, ɪnˈdɛm ən-)

incapable of being demonstrated.
in`de•mon′stra•bly, adv.
References in periodicals archive ?
This article shows why this is so: because Albert regards the temporal beginning of the world as essential to the meaning of creation, and, because he holds that it is impossible to demonstrate the temporal beginning of the world, he concludes that the creation of the world is philosophically indemonstrable.
34) That is, he assumed that every literate reader out there would know that, before a demonstration or experiment could be offered, certain indemonstrable points had to be in place--indemonstrable because no demonstration could be understood if these points were not grasped.
Although theology rested on faith, and faith had a cognitive dimension that could be persuasively presented, nonetheless faith was indemonstrable to those outside its commitment, and the truth of faith could not "be established from within the framework of the unconverted.
Pomponazzi's aim, she claims, is to protect the fully indemonstrable religious doctrines from subjection to rational inquiry.
Alternatively, Aristotle might have thought that the subject matter of rational inquiry is indeed pluralistic and that within various sciences one must formulate indemonstrable principles but that the existence of the subject matter is nonetheless capable of some explanation.
As to the impossible claims by Samuel Bawlf that Drake's Golden Hind made a surfer's tour of the Northwest Coast in 44 days and passed through then-deadly Seymour Narrows and the tide rips off Ten Mile Point without two large Yamaha outboard motors strapped on her transom, he has left it to the noted authority, Edward Von der Porten, to answer the indemonstrable claims.
My argument, however, is that this charge of contradiction, of heterodoxy, is thoroughly indemonstrable, both historically and theologically.
254) Human law also attempts to delineate proper responses to specific situations that natural law would require, as Aquinas concluded, "it is from the precepts of the natural law, as from general and indemonstrable principles, that the human reason needs to proceed to the more particular determination of certain matters.
With Aquinas, Finnis maintains that the first principles of practical reason are per se nota and are indemonstrable, just as the first principles of speculative reason are per se nota and indemonstrable.
In summary, the speculative intellect develops reasoned thought from a set of indemonstrable principles, while the practical intellect grasps the first principles of morality based on the meaning and nature of the good (Cessario 2001).
Thus, in the realm of speculative, or theoretical, thought, he says: "This first indemonstrable principle 'There is no affirming and denying the same simultaneously,' is based on the very nature of the real and the non-real: on this principle, as Aristotle notes, all other propositions are based.
One version renders doubtful and indemonstrable the actual existence of material objects in space.