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admissibility the concept in the law of evidence that determines whether or not evidence can be received by the court. The evidence must first be relevant, but even relevant evidence will be tested for its admissibility. Thus, that a suspect has confessed is relevant but, in modern times, if the confession has been obtained other than voluntarily it will, in many jurisdictions, be excluded as inadmissible. See e.g. HEARSAY, EXCLUSIONARY RULE, RELEVANCE.