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Theory

Definition

noun, plural: theories

(general)

(1) A conjecture, an opinion, a speculation or an assumption based on limited information or experience, not necessarily on facts.

(2) An expectation of what would happen, excluding unforeseen circumstances. For instance, the theory that criminals usually return to the scene of the crime.

(science) A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.

(mathematics) A branch of mathematics attempting to describe a particular class of constructs, and includes axioms, theorems, examples, etc.


Supplement

The common use of the term theory implies speculation or assumption that has not been verified or has limited proofs. In science, an unproved idea or a mere theoretical speculation is regarded as a hypothesis rather than a scientific theory. However, in science, a theory is a well-substantiated explanation or a set of statements that have been confirmed over the course of many independent experiments. In comparison, laws explain things but don't describe them, whereas theories describe why we see a set of observations. E.g., Newton's Law of Gravity describes how gravity works but not why there is gravity. Darwin's Theory of Evolution by Natural Selection tells us why the observations about life on this planet are as we see them. Both scientific theories and laws are based on facts and are accepted to be true by the scientific community. And both are used to make predictions of future events.


Word origin: L theōria < Gk theōría a viewing, contemplating.

Derived terms: theorem, theoretical (adjective), theorize (verb).
Related terms: probability theory, temperament theory, game theory, pithecoid theory.

Compare: hypothesis, law.


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Re: The evolution of facilitation and semelparity

... too much in this litter to save for the next (or risk not being able to have a next litter). For more information read up on Life history theory. here this cost will be much smaller for our species if it was semelparous as although its investment in each offspring is small, the cost of ...

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by Youngji
Sun Jan 11, 2015 11:55 am
 
Forum: Evolution
Topic: The evolution of facilitation and semelparity
Replies: 3
Views: 1028

Re: Please read! About life history strategies!

... parent's survival chances , and thus reduce the ability of a parent to provide food for future offspring. For more information read Life history theory. here this cost will be much smaller for A if it was r selected as although its investment in each offspring is small, the cost of reproduction ...

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by Youngji
Sun Jan 11, 2015 11:30 am
 
Forum: Ecology
Topic: Please read! About life history strategies!
Replies: 2
Views: 1050

I have got some BIG issues! forgive the long post

... about the HLA systems Here is the manual notes from my School babes! BLOOD GROUP SYSTEMS ABO The ABO genes reside on the chromosome 9 (Bernstein’s theory). The blood groups A and B are further subdivided into subgroups, with A being in a form A1 or A2 (A1 is dominant to A2) and B in many forms ...

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by saddy51
Sun Jan 04, 2015 10:39 am
 
Forum: Genetics
Topic: I have got some BIG issues! forgive the long post
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holographic origin of life

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by minasole
Thu Jan 01, 2015 9:02 am
 
Forum: Evolution
Topic: holographic origin of life
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Dr. Jobe Martin Arguments

Don't like evolution? Develop your own competing theory that explains everything evolution explains and more .

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by wildfunguy
Tue Dec 02, 2014 4:24 pm
 
Forum: Evolution
Topic: Dr. Jobe Martin Arguments
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Views: 14116
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