Lexicon

Topic

Moral and Political Philosophy Aesthetics Christology Ecclesiology Epistemology Human Person Logic Metaphysics Moral Theology Philosophy of Nature

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Topic

Moral and Political Philosophy Aesthetics Christology Ecclesiology Epistemology Human Person Logic Metaphysics Moral Theology Philosophy of Nature

Principle of Double Effect
The principle according to which an action that has both a good and a bad effect is morally permissible on the following four conditions: (a) the act to be performed is morally good in itself or moral...
Principle of Excluded Middle
The principle according to which there is no third possibility between being and non-being. Thus, something either is or is not.
Principle of Finality
The principle according to which every agent is ordered toward an end. It is sometimes formulated in the following way: every agent acts for an end or, in Latin, omne agens agit propter finem.
Principle of Identity
The principle according to which being is being, and non-being is non-being.
Principle of Likeness in Causality
(omne agens agit sibi simile).— The metaphysical principle according to which all effects have some formal likeness to their cause. This principle is sometimes expressed thus: every cause likens its...
Principle of Non-Contradiction
(also called Principle of Contradiction, Law of Non-Contradiction, Law of Contradiction).— The principle according to which being is not non-being or, more exactly, that one and the same thing cannot...
Principle of Proportionate Causality
The principle according to which no effect can be greater than its efficient cause. Properly understood, this principle does not imply that the effect must be produced by a single cause which is equal...
Principle of Sufficient Reason
(also called Principle of Reason).— The principle according to which whatever exists must have a reason for its existence, this reason being either intrinsic or extrinsic to the thing which exists. So...
Privation
1. The absence of a form that could be present in a thing. E.g., the absence of motion in a ball. 2. The absence of what should be present; the absence of a due good; moral or natural evil. E.g., the...
Property
1. See Necessary Accident. 2. Any attribute of a thing. 3. In logic, a predicable designating that something belongs only, necessarily, and always to a given species and its members. For example, to b...

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Topic

Lexicon

Topic

Principle of Double Effect

Principle of Excluded Middle

Principle of Finality

Principle of Identity

Principle of Likeness in Causality

Principle of Non-Contradiction

Principle of Proportionate Causality

Principle of Sufficient Reason

Privation

Property

Current Operations Supported by: