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Logic
November 15, 2023

MANY-VALUE LOGICS

In the classical logics already discussed, the logical connectives are taken to be bivalent—that is, they allow of only two different truth values: true and false. One natural extension to…
History Of PhilosophyANALYTIC PHILOSOPHY
November 15, 2023

LOGICAL POSITIVISM

Originally founded by Auguste Comte (1798–1857), Positivism was primarily a view about science. Influenced by Immanuel Kant’s (1724-1804) assertion that knowledge of things-inthemselves was impossible, Comte argued that our scientific…
FORMS OF PHILOSOPHICAL WRITING
November 20, 2023

THE PERSONAL ESSAY

The personal essay is a self-reflective search for meaning. Unlike most philosophical writing, it is not argumentative. Instead, it is exploratory and speculative, often even somewhat confessional. It is typically…
Modern Branches of PhilosophyPhilosophy Branches
November 14, 2023

PHILOSOPHY OF MATHEMATICS

The philosophy of mathematics is traditionally concerned with the ontological and epistemological foundations of mathematics. The two questions, of ontology and epistemology, are intimately related, as a satisfactory account of…
Writing Philosophy
November 24, 2023

WRITING IS CENTRAL TO PHILOSOPHY

For the great majority of us, writing is instrumental to thinking. Since it is reasonable to describe philosophy as the application of disciplined thought to a variety of topics, issues,…
FORMS OF PHILOSOPHICAL WRITINGWriting Philosophy
November 19, 2023

THE EXPOSITORY PAPER

We have already touched on the expository paper, but let’s discuss it briefly here. Look at the adjective expository. It is derived from the noun exposition, which is the noun…
WHAT IS PHILOSOPHY?
November 24, 2023

PHILOSOPHICAL FILMS AND TV SHOWS

Note: Some of these titles may be difficult to find, either in DVD format or streaming. Film Animation Animal Farm (1954)Based on George Orwell’s novel of the same name, farm…
CONTINENTAL PHILOSOPHYHistory Of Philosophy
November 15, 2023

CONTINENTAL PHILOSOPHY IN THE TWENTIETH CENTURY

While the focus of western philosophy has primarily been on the analysis and understanding of our most basic concepts, another important theme has been the preparation and education of man…
CONTINENTAL PHILOSOPHYHistory Of Philosophy
November 15, 2023

THE FRANKFURT SCHOOL

A group of philosophers, cultural critics, and social scientists based around the Frankfurt (Germany) Institute for Social Research were primarily concerned with integrating philosophical analysis with then-recent results in the…
PHILOSOPHICAL BOOKS AND TEXT
November 27, 2023

INTRODUCTORY LOGIC TEXTS

There are some fairly firm distinctions between critical thinking and formal (symbolic) logic texts. Whereas critical thinking focuses broadly on argumentation, formal logic is the study of the principles of…
THE EARLY MODERN PERIODHistory Of Philosophy
November 15, 2023

LIBERALISM

A political philosophy whose central claim is that a government’s authority is justified only insofar as it secures the liberty of its subjects, Liberalism is generally traced to John Locke…
History Of Philosophy
November 15, 2023

THE PRE-SOCRATICS

The origins of Western philosophy are usually attributed to Thales of Miletus (fl. sixth century BC), who taught that “everything was made of water” and thus that the universe, all…
Philosophy BranchesTraditional Branches of Philosophy
December 12, 2023

NATURAL PHILOSOPHY

An important historical branch designation rather than a current one, natural philosophy was the study of nature and the physical universe by philosophical (that is, largely empirical reason-based) methods.
Philosophy BranchesTraditional Branches of Philosophy
December 12, 2023

PHILOSOPHY OF LAW

The philosophy of law is concerned with all aspects of theoretical reflection on laws and legal systems and therefore encompasses historical and sociological studies in addition to the philosophical questions…
NON-WESTERN PHILOSOPHICAL TRADITIONSHistory Of Philosophy
November 15, 2023

PHILOSOPHIES OF EAST ASIA

The dominant philosophical traditions in this part of the world began in Ancient China from the sixth century to 221 BC, which saw the development of China’s great philosophical movements…

Books

  • Moses and Abraham Maimonides: Encountering the Divine (Emunot: Jewish Philosophy and Kabbalah)

    $35.00
  • The Journey of the Mind to God (Hackett Classics)

    $14.00
  • Body Aware: Rediscover Your Mind-Body Connection, Stop Feeling Stuck, and Improve Your Mental Health with Simple Movement Practices

    $17.95
  • Stop Overthinking, Stop Worrying: Overcome Negative Thinking with Easy Exercises and Master Your Emotions to Achieve Peace of Mind

    $15.95
  • Meditations (A Penguin Classics Hardcover)

    $13.79
  • Tao Te Ching – The Way of Life

    $9.95
  • The Origin of Consciousness in the Breakdown of the Bicameral Mind

    $16.43
  • Welcoming the Unwelcome: Wholehearted Living in a Brokenhearted World

    $14.99
  • Consolation of Philosophy

    $47.00
  • Three Rival Versions of Moral Enquiry: Encyclopaedia, Genealogy, and Tradition

    $29.00
  • Think Like Socrates: Unlock the Power of Socratic Questioning to Improve Your Critical Thinking and Persuasion Skills.

    $12.99
  • Alienation (New Directions in Critical Theory, 4)

    $27.00
  • The Metaphysical Club: A Story of Ideas in America

    $11.99
  • The Communist Manifesto

    $3.00
  • Pensées (Dover Thrift Editions: Philosophy)

    $7.00
  • In Praise of Failure: Four Lessons in Humility

    $27.85

Terms & Concepts

E

E-proposition

A universal negative categorical claim that asserts the subject and predicate classes are mutually exclusive of each other—that is, the subject class is excluded from the predicate class and vice…
O

Obversion

An immediate inference in which the proposition’s quality is changed and the predicate is replaced with its complement. (See also Categorical proposition, Complement, and Quality.) Obversion is valid for all…
C

Change of Quantifier (Quantifier Exchange) Rule

In quantifier logic, one quantified statement can be substituted for another that is logically equivalent to the original. A universally quantified statement is equivalent to an existentially quantified statement (and…
T
Transcendent
D
Disjunct
L
Law of contradiction
T
Thing-in-Itself
A
Ad-hoc hypothesis
S
Semiotics
A
Argument
M
Minor premise
R
Rationalism
View All