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Evidence in its broadest sense, refers to anything that is used to determine or demonstrate the Truth of an assertion. Philosophically , evidence can include propositions which are presumed to be true used in support of other propositions that are presumed to be Falsifiable . The term has specialized meanings when used with respect to specific fields, such as Policy , Scientific Research , Criminal Investigation s, and Legal Discourse .

The most immediate form of evidence available to an individual is the observations of that person's own senses. For example an observer wishing for evidence that the sky is blue need only look at the sky. However this same example illustrates some of the difficulties of evidence as well:
  • someone who was blue-yellow Color Blind , but did not know it, would have a very different perception of what color the sky was than someone who was not. Even simple sensory perceptions ('' Qualia '') ultimately are Subjective ; guaranteeing that the same information can be considered somehow true in an Objective sense is the main challenge of establishing standards of evidence.

  • there is also the question of what is meant by 'blue', and how we measure it. (If determined by a particular wave-length of colour - then how do we actually measure this?

  • there is also the question of how evidence 'translates' e.g. is 'blau' in German universally translated as 'blue' in English: Germans may have different words for different parts of the spectrum; thus 'evidence' is a Social Construction .



EVIDENCE IN SCIENCE

See Also: Scientific evidence


In scientific research evidence is accumulated through observations of phenomena that occur in the natural world, or which are created as when possible to replicate is enough to reject a theory incompatible with that evidence.


EVIDENCE IN CRIMINAL INVESTIGATION

In criminal investigation, rather than attempting to prove an abstract or hypothetical point, the evidence gatherers are attempting to determine who is responsible for a Criminal act. The focus of criminal evidence is to connect physical evidence and reports of witnesses to a specific person.


EVIDENCE IN LAW

See Also: Evidence (law)


Legal Evidence differs from the above in the tight rules governing the presentation of facts that tend to prove or disprove the point at issue. In law, certain policies require that evidence that tends to prove or disprove an assertion or fact must nevertheless be excluded from consideration based either on indicia relating to reliability, or on broader social concerns. Testimony (which tells) and exhibits (which show) are the two main categories of evidence presented at a trial or hearing.


EVIDENCE IN STATISTICS

This is the key of Statistical Inference , for which see e.g. the work of Allan Birnbaum and others.


TYPES OF EVIDENCE




EXTERNAL LINKS

  • http://www.evidencescience.org/