On petitio principii in legal argumentation
On petitio principii in legal argumentation

Summary/Abstract: In the Article I attempted to discuss and describe petitio principii in the sphere of formulating and proposing arguments in the actual practice of law. First, I discussed a basic – from a historical perspective and also its frequency of usage – conception of petitio principii. Then, received in such way data (i. e. ratio propria of the name 'petitio principii'; in other words the name by means of we describe some fallacy in demonstration) were brought face to face with a conception of an argument, namely with the information on its function and structure. This operation provided a form of petitio principii that – in regards to general and abstractive character – can be used in any discussion. The final stage of the considerations concentrated on specification of such general and abstractive conception of petitio principii by introducing essential aspects of a persuasion existing in legal practice.

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