An excerpt from an OUPblog article published on 10th July 2016, written by Thomas Ferguson and Graham Priest, co-authors of A Dictionary of Logic.
'Logic is a deep subject, at the core of much work in philosophy, mathematics, and computer science. In very general terms, it is the study of what (conclusions) follows from what (premises)—logical consequence—as in:
Premise: All men are mortal
Premise: Socrates is a man
Conclusion: So Socrates is mortal
The Early Modern philosopher, Immanuel Kant, held that Aristotle invented logic, and at his hands it was complete. There was nothing left to be done. As he says:
“Logic, by the way, has not gained much in content since Aristotle’s times and indeed it cannot, due to its nature… In present times there has been no famous logician, and we do not need any new inventions in logic, because it contains merely the form of thinking.” — From the introduction to his lectures on logic
He was notoriously wrong.'
Discover more: Read the rest of the article on the OUPblog.