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 evidence against the theory if it is less likely if the theory is true.)
 
'''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 evidence against the theory if it is less likely if the theory is true.)
  
 
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.
 
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.
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==Blog posts==
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*[http://lesswrong.com/lw/jl/what_is_evidence/ What is Evidence?]
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*[http://lesswrong.com/lw/jn/how_much_evidence_does_it_take/ How Much Evidence Does It Take?]
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*[http://lesswrong.com/lw/in/scientific_evidence_legal_evidence_rational/ Scientific Evidence, Legal Evidence, Rational Evidence]
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*[http://lesswrong.com/lw/jm/the_lens_that_sees_its_flaws/ The Lens That Sees Its Flaws]
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*[http://lesswrong.com/lw/k1/no_one_can_exempt_you_from_rationalitys_laws/ No One Can Exempt You From Rationality's Laws]
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*[http://lesswrong.com/lw/qk/that_alien_message/ That Alien Message]
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*[http://lesswrong.com/lw/1y9/information_theory_and_the_symmetry_of_updating/ Information theory and the symmetry of updating beliefs] by [[Academian]]
  
 
==See also==
 
==See also==
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*[[Generalization from fictional evidence]]
 
*[[Generalization from fictional evidence]]
 
*[[Conservation of expected evidence]]
 
*[[Conservation of expected evidence]]
 
==Blog posts==
 
 
*[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/in/scientific_evidence_legal_evidence_rational/ Scientific Evidence, Legal Evidence, Rational Evidence] by [[Eliezer Yudkowsky]]
 
*[http://lesswrong.com/lw/jm/the_lens_that_sees_its_flaws/ The Lens That Sees Its Flaws] by [[Eliezer_Yudkowsky]]
 
  
 
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[[Category:Concepts]]
 
[[Category:Concepts]]

Latest revision as of 07:35, 9 June 2010

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Wikipedia has an article about

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 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.

Blog posts

See also