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A theory is an abstract or systematic explanation of some phenomenon or subject matter. It is more substantial than a conjecture or hypothesis, but may not be verified as factual.

A theory is an abstract or systematic explanation of some phenomenon or subject matter. {{fact}} It is more substantial than a conjecture or hypothesis, but may not be verified as factual. {{fact}}

The term theory is often used outside of science, such as in music theory, number theory, or Marxist theory.

The term theory is often used outside of science, such as in music theory, number theory, or Marxist theory.

==Scientific Theory==

==Scientific Theory==

A scientific theory is a model or framework for describing the behavior of a related set of natural or social phenomena. A theory is a plausible or consistent explanation; it becomes scientific when it is subjected to empirical scrutiny. A Scientific Theory must be falsifiable, meaning that there must be some way to do observations that might disprove the theory.  

A scientific theory is a model or framework for describing the behavior of a related set of natural or social phenomena. A theory is a plausible or consistent explanation; it becomes scientific when it is subjected to empirical scrutiny. {{fact}} A Scientific Theory must be falsifiable, meaning that there must be some way to do observations that might disprove the theory.  

A scientific theory does not necessarily have to have strong experimental support or accepted by the scientific community. Scientists often refer to untested theories and competing theories. Theories can be extremely well-confirmed, such as conservation of energy, or wildly speculative, such as [[String Theory]].

A scientific theory does not necessarily have to have strong experimental support or accepted by the scientific community. {{fact}} Scientists often refer to untested theories and competing theories. {{fact}} Theories can be extremely well-confirmed, such as conservation of energy, or wildly speculative, such as [[String Theory]].

The [[Theory of Evolution]] includes [[microevolution]] (change in allele frequency over time),

The [[Theory of Evolution]] includes [[microevolution]] (change in allele frequency over time),

which is well-confirmed, and the idea that there existed a universal common ancestor for all

which is well-confirmed, and the idea that there existed a universal common ancestor for all

life on Earth, which remains controversial.

life on Earth, which remains controversial. {{fact}}