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  2. Ontology - Wikipedia

    en.wikipedia.org/wiki/Ontology

    Fact ontologies present a different approach by focusing on how entities belonging to different categories come together to constitute the world. Facts, also known as states of affairs, are complex entities; for example, the fact that the Earth is a planet consists of the particular object the Earth and the property being a planet. Fact ...

  3. Glossary of logic - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_logic

    A system in which entities are ranked one above the other based on certain criteria, often used in the context of sets, classes, or organizational structures. In logic, an important one is Tarski's hierarchy. In set theory, an important one is the cumulative hierarchy. higher-order logic

  4. Scientific theory - Wikipedia

    en.wikipedia.org/wiki/Scientific_theory

    One can use language to describe a model; however, the theory is the model (or a collection of similar models), and not the description of the model. A model of the solar system, for example, might consist of abstract objects that represent the sun and the planets. These objects have associated properties, e.g., positions, velocities, and masses.

  5. Metonymy - Wikipedia

    en.wikipedia.org/wiki/Metonymy

    In metaphor, this substitution is based on some specific analogy between two things, whereas in metonymy the substitution is based on some understood association or contiguity. [7] [8] American literary theorist Kenneth Burke considers metonymy as one of four "master tropes": metaphor, metonymy, synecdoche, and irony.

  6. Subject and object (philosophy) - Wikipedia

    en.wikipedia.org/wiki/Subject_and_object...

    The second definition holds that an object is an entity experienced. The second definition differs from the first one in that the second definition allows for a subject to be an object at the same time. [3] One approach to defining an object is in terms of its properties and relations. Descriptions of all bodies, minds, and persons must be in ...

  7. Unity of opposites - Wikipedia

    en.wikipedia.org/wiki/Unity_of_opposites

    It is the stable tension between the opposites that accounts for the unity, and in fact, the opposites presuppose one another analytically. For example, 'upward' cannot exist unless there is a 'downward', they are opposites but they co-substantiate one another, their unity is that either one exists because the opposite is necessary for the ...

  8. Argument from analogy - Wikipedia

    en.wikipedia.org/wiki/Argument_from_analogy

    To understand how one might analyse an argument from analogy, consider the teleological argument and its criticisms put forward by the philosopher David Hume. The logic behind the watchmaker argument states that you cannot assume that a complex and precise object like a watch was created through some random process.

  9. Reality - Wikipedia

    en.wikipedia.org/wiki/Reality

    One can also speak of anti-realism about the same objects. Anti-realism is the latest in a long series of terms for views opposed to realism. Perhaps the first was idealism , so called because reality was said to be in the mind, or a product of our ideas .