REVÍZIA DEFINÍCIÍ POJMOV DOSTATOČNÁ A NUTNÁ PODMIENKA

• Authors: František Gahér

Title variants

EN

Revision of the notions of sufficient condition and necessary condition

• Languages of publication: SK

Abstracts

EN

Analysing the process of keeping promise we identify its sequence structure and its phase sequences in time. This allows us to arrive at the time order principle forming according to which obligation performance cannot precede in time its sufficient or necessary conditions performance. We further observe that a given promise must always be taken as an element of a certain system of promises. As a result we review definitions of the terms sufficient condition and necessary condition as no more allowing their mutual defining, or symmetry (conversion). We try to discover the compliance rules concerning the condition – the conditioned vector, the course of events vector and the time vector. We conclude that it indicates an incorrect use if, provided the condition – the conditioned vector complies with the course of events vector, the negative time difference in the descriptive use of sentences involving either the if-then connective or the only if connective is obtained. Only when using sentences for abductee explanation with a dominating epistemic vector the negative difference of time does not indicate erroneous use; however, this is possible only for the term of sufficient condition. We further suggest reviewed definition generalization involving the terms of sufficient condition and necessary condition containing always a parameter element denoting a given modality type, or a particular system of rules, laws, etc. Such definition satisfies Brennan’s requirement of a “general formal scheme” where the notion of sufficient condition and necessary condition symmetry (conversion) does not apply.

Keywords

EN

SUFFICIENT CONDITION; NECESSARY CONDITION; IF-THEN; IF-VECTOR; MODALITY

• Publisher: Institute of Philosophy of the Slovak Academy of Sciences and Institute of Philosophy of Academy of Sciences of Czech Republic
• Journal: Organon F. medzinárodný časopis pre analytickú filozofiu
• Year: 2012
• Volume: 19
• Issue: 1
• Pages: 16 – 37

Contributors

author

František Gahér

• Katedra logiky a metodológie vied, Filozofická fakulta UK, Šafárikovo nám. 6, 814 99 Bratislava, Slovak Republic