Difference between revisions of "Evidence"

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'''Evidence''' for a given theory is the observation of an event that is more likely to occur if the theory is true than if it is false. (The event would be rational evidence against the theory if it is less likely if the theory is true.)
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The likelihood ratio term <math>\frac{P(B | A)}{P(B|\neg A)}</math> from [[Bayes' theorem]] is greater than 1 if the event B is evidence of the theory A, and less than 1 if the event is evidence against the theory.
  
 
==See also==
 
==See also==
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*[[Generalization from fictional evidence]]
 
*[[Generalization from fictional evidence]]
 
*[[Evidence of absence]]
 
*[[Evidence of absence]]
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==Blog posts==
 
==Blog posts==
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*[http://lesswrong.com/lw/jl/what_is_evidence/ What is Evidence?] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/jl/what_is_evidence/ What is Evidence?] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/jn/how_much_evidence_does_it_take/ How Much Evidence Does It Take?] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/jn/how_much_evidence_does_it_take/ How Much Evidence Does It Take?] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/in/scientific_evidence_legal_evidence_rational/ Scientific Evidence, Legal Evidence, Rational Evidence] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/in/scientific_evidence_legal_evidence_rational/ Scientific Evidence, Legal Evidence, Rational Evidence] by [[Eliezer Yudkowsky]]
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[[Category:Concepts]]

Revision as of 05:31, 13 June 2009

Evidence for a given theory is the observation of an event that is more likely to occur if the theory is true than if it is false. (The event would be rational evidence against the theory if it is less likely if the theory is true.)

The likelihood ratio term from Bayes' theorem is greater than 1 if the event B is evidence of the theory A, and less than 1 if the event is evidence against the theory.

See also

Blog posts