Concept
Logic
Overview
study of correct reasoning
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
In the original texts
Passages from public-domain books where Logic is discussed.
Hegel and his followers widened the scope of logic in quite a different way--a way which I believe to be fallacious, but which requires discussion if only to show how their conception of logic differs from the conception which I wish to advocate. In their writings, logic is practically identical with metaphysics. In broad outline, the way this came about is as follows.
Bertrand Russell, Our Knowledge of the External World as a Field for Scientific Method in Philosophy
names the idea; a chapter is titled for it; states what it is; author linked in the graph; opens on it
It affects, in the first place, the nature of logic itself. If thought or intelligence is the means of intentional reconstruction of experience, then logic, as an account of the procedure of thought, is not purely formal.
John Dewey, Reconstruction in Philosophy
names the idea; states what it is; author linked in the graph; opens on it
From different points of view, Logic is either the hardest or the easiest of the sciences, Logic is hard, because it has to deal not with perceptions, nor, like geometry, with abstract representations of the senses, but with pure abstractions; and because it demands a force and facility of withdrawing into pure thought, of keeping firm hold on it, and of moving in such an element. Logic is easy, because its facts…
Georg Wilhelm Friedrich Hegel, The Logic of Hegel
names the idea; states what it is; the book is about it; opens on it
Now this is a subject which stands on the very threshold of the science of logic.
John Stuart Mill, A System of Logic, Ratiocinative and Inductive
names the idea; the book is about it; author linked in the graph; opens on it
Had logic possessed the courage long ago to throw overboard this subjective Jonah it would have been spared the storms of epistemology and the reefs of metaphysics. Analytic logic is the first attempt in the history of modern logical theory at a deliberate, sophisticated exclusion of the act of knowing from logic. Other logics, to be sure, have tried to neutralize the effects of its presence, but none has had the…
John Dewey, Creative Intelligence
names the idea; states what it is; author linked in the graph; opens on it
Philosophers who discussed Logic
- Tadeusz Kotarbiński
- Kazimierz Twardowski
- Józef Maria Bocheński
- Epictetus
- Georg Simmel
- John Scotus Eriugena
- Udayana
- Avicenna
- Hemachandra
- Nelson Goodman
- Stilpo
- Gottfried Wilhelm Leibniz
- Galen
- Je Tsongkhapa
- Henri Bergson
- Heraclitus
- Carl Gustav Hempel
- Bas van Fraassen
- Alexander Bain (philosopher)
- Immanuel Kant
- Ibn Hazm
- David Kaplan (philosopher)
- Stephen Toulmin
- Mircea Eliade
Related ideas
- Belief
- Formal language
- First-order logic
- Avicenna
- Georg Cantor
- Gottfried Wilhelm Leibniz
- Georg Wilhelm Friedrich Hegel
- Argument
- Argumentation theory
- Permission (philosophy)
- Deontic logic
- Philosophy
- Informal logic
- Interpretation (logic)
- Computability theory
- John Stuart Mill
- Albertus Magnus
- Jainism
- Negation
- Truth value
- Informal fallacy
- Intuitionistic logic
- Foundations of mathematics
- Dialogue
Opposing perspectives
- Philosophy
- Ontology
- Truth
- Nonsense
- Metalanguage
- Psychology
- Chess
- Connotation
- Higher-order logic
- Logic translation
- Proposition
- Deliberation
- Non-classical logic
Place in the tradition
Part of A. C. Grayling.