As Jack Meiland (1976) construes Erdmann's philosophy of logic, the psychological interpretation of logical principles is meant to explain why we cannot conceive of radically different logical systems.
Nevertheless, already on this informal level one is forced to reject one of the logical principles ever-present in classical logic: the principle of the excluded middle $(A\vee \neg A)$.
Book III of Richard Whately's Elements of Logic (1826) is devoted to giving an account, based on "logical principles," of fallacies.
The inclusion of the principle Ex Falso Sequitur Quodlibet, $(\bot \rightarrow A $, in intuitionistic logic is a point of discussion for those studying Brouwer's remarks on the subject; in van Atten 2008, it is argued that the principle is not valid in Intuitionism and that the logical principles valid according to Brouwer's views are those of relevance logic.
How should a justice system designed on logical principles respond to those who are beyond reason?
For unlike empirical observations, which may be mistaken or incomplete, philosophical findings depend primarily on rational and logical principles.
In it he sought to teach students how to use logical principles to spot correct or fallacious reasoning in a wide variety of contemporary political and social debates.
Since at least the Middle Ages, philosophers and philologists have dreamed of curing natural languages of their flaws by constructing entirely new idioms according to orderly, logical principles.
Usually, however, a more regular system resulted, and most of these systems can be classified, at least roughly, according to the logical principles underlying them.
ALAN SOKAL: Yes, it's hard to imagine what an ab initio justification of logical principles like modus ponens would look like.
The rightness of actions is discovered by a special moral faculty, seen as analogous to the power of observation or the power of intuiting logical principles.
