Main Article Content
A true conclusion follows deductively from true premises. However, what if the premises are not true? Therefore, certain aspects of the relation between premises and conclusions in valid arguments are re-investigated again.
Methods of logical inference (modus ponens, modus tollens et cetera) were analysed again.
Reliable scientific proof methods are of use in order to identify as soon as possible non-scientific claims and to help authors not to suffer too long from self-contradictory and sometimes highly abstract, especially mathematical stuff.
Modus inversus has the potential to prevent us from accepting seemingly contradictory theorems or rules in science.