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The word "theory" has a number of distinct meanings in different fields of knowledge, depending on the context and their methodologies. In common usage, people use the word "theory" to signify "conjecture", "speculation", or "opinion." In this sense, "theories" are opposed to "facts" — parts of the world, or claims about the world, that are real or true regardless of what people think.

In science, a theory is a proposed description, explanation, or model of the manner of interaction of a set of natural phenomena, capable of predicting future occurrences or observations of the same kind, and capable of being tested through experiment or otherwise falsified through empirical observation. It follows from this that for scientists "theory" and "fact" do not necessarily stand in opposition. For example, it is a fact that an apple dropped on earth has been observed to fall towards the center of the planet, and the theory which explains why the apple behaves so is the current theory of gravitation.

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Studying about the importance of family systems and systems theory.
PastorPhelps (Kenneth Phelps) Wed, 16 Dec 2009 12:42:40 -0000
Studying about the importance of family systems and systems theory.
Bom, agora vou ver The Big Bang Theory #adoro
f5puff (Fernanda Assunção) Wed, 16 Dec 2009 12:42:30 -0000
Bom, agora vou ver The Big Bang Theory #adoro
Quantum Theory of Optical Coherence: Selected Papers and Lectures http://goo.gl/fb/Vv6t
fooshare (fooShare Community) Wed, 16 Dec 2009 12:42:26 -0000
Quantum Theory of Optical Coherence: Selected Papers and Lectures http://goo.gl/fb/Vv6t
Gonna kick this theory final's ass to the curb. :)
saxysmarty (Maura Lowrie) Wed, 16 Dec 2009 12:42:21 -0000
Gonna kick this theory final's ass to the curb. :)
I'm feeling pretty good about this theory test, thanks to Ayako Hattori!!! She's awesommmme
MeHeartCeltics (Tracie D.) Wed, 16 Dec 2009 12:42:12 -0000
I'm feeling pretty good about this theory test, thanks to Ayako Hattori!!! She's awesommmme
「理論(=theory)」と「論理(=logic)」を混同してしゃべるひとにはけっこう違和感。 [h]
cursed_steven (ノロワレSteven ) Wed, 16 Dec 2009 12:41:38 -0000
「理論(=theory)」と「論理(=logic)」を混同してしゃべるひとにはけっこう違和感。 [h]

 
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ACM SIGPLAN - The ACM Special Interest Group for Programming Languages. SIGPLAN explores techniques and tools for programming language implementation, design, and use.

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Programming Language Research - A collection of information and resources for research in programming language theory, design, implementation, and related areas.

Researchers in Programming Languages and Compilers - A list of home pages for researchers working on programming language theory, design, implementation, and related areas. Maintained by Mark Leone at CMU.

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