PETITIO PRINCIPII Definition & Meaning

petitio principii

[ pi-tish-ee-oh prin-sip-ee-ahy; Latin pe-tee-ti-oh pring-kip-i-ee ]

Phonetic (Standard)IPA

noun

Logic.

a fallacy in reasoning resulting from the assumption of that which in the beginning was set forth to be proved; begging the question.

petitio principii

/ pɪˈtɪʃɪˌəʊ prɪnˈkɪpɪˌaɪ /

noun

logic a form of fallacious reasoning in which the conclusion has been assumed in the premises; begging the question Sometimes shortened topetitio

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51�Թ� History and Origins

Origin of petitio principii¹

1525–35; < Medieval Latin petītiō prīncipiī, translation of Greek tò en archêi aiteîsthai the assumption at the outset

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51�Թ� History and Origins

Origin of petitio principii¹

C16: Latin, translation of Greek to en arkhei aiteisthai an assumption at the beginning

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Example Sentences

Examples have not been reviewed.

And it is as much a petitio principii to assume, in Ethics, the existence of moral feelings, as to assume, in Optics, the existence of sight.

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But if, as it would seem, the implication is meant that there are no other entities which can be object to the mind except such "things," then it is a clear petitio principii.

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In other words, omitting his petitio principii and his allusion to the test of fertility, the great criterion in his view is the criterion of Heredity.

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Mr. Mill decides that the proposition is not a petitio principii; Dr. Farrar says, as in continuation of his reference to Mr. Mill, that it is a flagrant petitio principii.

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The great argument that men are determined by the strongest motives, is a mere equivocation, and what logicians call petitio principii.

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