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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@vikingsuicide In theory, sure. The mechanism for billions self governing themselves is...incomprehensible.
agent139 (James Curcio) Sat, 07 Nov 2009 07:59:51 -0000
@vikingsuicide In theory, sure. The mechanism for billions self governing themselves is...incomprehensible.
New Theory - The Kids Are Alright? #lost http://bit.ly/wzy7C
DarkUFO (DarkUFO) Sat, 07 Nov 2009 07:59:38 -0000
New Theory - The Kids Are Alright? #lost http://bit.ly/wzy7C
Wonders what people think about GNS theory
The_HengeKeeper (Joshua Maley Hagan) Sat, 07 Nov 2009 07:57:32 -0000
Wonders what people think about GNS theory
@VegasVickie Thanks! I like theme motels in theory. In practice, not enough Purell. Haha!
molliekatie (Mollie Katie) Sat, 07 Nov 2009 07:56:15 -0000
@VegasVickie Thanks! I like theme motels in theory. In practice, not enough Purell. Haha!
@flyyoufools : You've seen dis right? My theory is dat future directors gave up not wantin to follow in its awesomeness! XD http://3.ly/p2U
sahilriz (Sahil Rizwan) Sat, 07 Nov 2009 07:54:55 -0000
@flyyoufools : You've seen dis right? My theory is dat future directors gave up not wantin to follow in its awesomeness! XD http://3.ly/p2U
Movie was alright. Now back home where I am testing a theory that Bigfoot still tastes good after a year in the dark. Research rocks.
pacificbrewnews (Rick Sellers) Sat, 07 Nov 2009 07:54:06 -0000
Movie was alright. Now back home where I am testing a theory that Bigfoot still tastes good after a year in the dark. Research rocks.

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