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There are individuals that can allegedly "defeat" the polygraph test. Have they been tested with the (fMRI) to determine if this method is as reliable as noted. Until such test are performed, we cannot be sure that the (fMRI) imaging test is necessarily better, in all cases, than the traditional polygraph test. Moreover, "functional psychotics" individuals may truly believe their account of an incident, even if the facts are materially different. Therefore, would the intervention of (fMRI) have the capacity to discern potential "lies" in such cases?