Speculative reason
Encyclopedia
Speculative reason or pure reason is theoretical (or logic
al, deductive
) thought (sometimes called theoretical reason), as opposed to practical (active, willing) thought. The distinction between the two goes at least as far back as the ancient Greek philosophers, such as Plato
and Aristotle
, who distinguished between theory
(theoria, or a wide, bird's eye view
of a topic, or clear vision of its structure) and practice (praxis), as well as productive knowledge (techne).
Speculative reason is contemplative, detached, and certain, whereas practical reason
is engaged, involved, active, and dependent upon the specifics of the situation. Speculative reason provides the universal, necessary principles of logic
, such as the principle of non-contradiction, which must apply everywhere, regardless of the specifics of the situation.
Practical reason
, on the other hand, is the power of the mind engaged in deciding what to do. It is also referred to as moral reason, because it involves action, decision, and particulars. Though many other thinkers have erected systems based on the distinction, two important later thinkers who have done so are Aquinas (who follows Aristotle
in many respects) and Kant
.
Logic
In philosophy, Logic is the formal systematic study of the principles of valid inference and correct reasoning. Logic is used in most intellectual activities, but is studied primarily in the disciplines of philosophy, mathematics, semantics, and computer science...
al, deductive
Deductive reasoning
Deductive reasoning, also called deductive logic, is reasoning which constructs or evaluates deductive arguments. Deductive arguments are attempts to show that a conclusion necessarily follows from a set of premises or hypothesis...
) thought (sometimes called theoretical reason), as opposed to practical (active, willing) thought. The distinction between the two goes at least as far back as the ancient Greek philosophers, such as Plato
Plato
Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...
and Aristotle
Aristotle
Aristotle was a Greek philosopher and polymath, a student of Plato and teacher of Alexander the Great. His writings cover many subjects, including physics, metaphysics, poetry, theater, music, logic, rhetoric, linguistics, politics, government, ethics, biology, and zoology...
, who distinguished between theory
Theory
The English word theory was derived from a technical term in Ancient Greek philosophy. The word theoria, , meant "a looking at, viewing, beholding", and referring to contemplation or speculation, as opposed to action...
(theoria, or a wide, bird's eye view
Bird's Eye View
"Bird's Eye View" is a single by Oakland Hip Hop group Zion I, released in 2005 on Live Up Records. The single was the first released from their third album True & Livin. The song, like Common's classic "I Used to Love H.E.R.", addresses the state of Hip Hop by comparing the culture to a woman. The...
of a topic, or clear vision of its structure) and practice (praxis), as well as productive knowledge (techne).
Speculative reason is contemplative, detached, and certain, whereas practical reason
Practical reason
In philosophy, practical reason is the use of reason to decide how to act. This contrasts with theoretical reason , which is the use of reason to decide what to believe. For example: agents use practical reason to decide whether to build a telescope, but theoretical reason to decide which of two...
is engaged, involved, active, and dependent upon the specifics of the situation. Speculative reason provides the universal, necessary principles of logic
Logic
In philosophy, Logic is the formal systematic study of the principles of valid inference and correct reasoning. Logic is used in most intellectual activities, but is studied primarily in the disciplines of philosophy, mathematics, semantics, and computer science...
, such as the principle of non-contradiction, which must apply everywhere, regardless of the specifics of the situation.
Practical reason
Practical reason
In philosophy, practical reason is the use of reason to decide how to act. This contrasts with theoretical reason , which is the use of reason to decide what to believe. For example: agents use practical reason to decide whether to build a telescope, but theoretical reason to decide which of two...
, on the other hand, is the power of the mind engaged in deciding what to do. It is also referred to as moral reason, because it involves action, decision, and particulars. Though many other thinkers have erected systems based on the distinction, two important later thinkers who have done so are Aquinas (who follows Aristotle
Aristotle
Aristotle was a Greek philosopher and polymath, a student of Plato and teacher of Alexander the Great. His writings cover many subjects, including physics, metaphysics, poetry, theater, music, logic, rhetoric, linguistics, politics, government, ethics, biology, and zoology...
in many respects) and Kant
KANT
KANT is a computer algebra system for mathematicians interested in algebraic number theory, performing sophisticated computations in algebraic number fields, in global function fields, and in local fields. KASH is the associated command line interface...
.