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UNCLASSIFIED//LAW ENFORCEMENT SENSITIVE (U) Appendix B: Confidence in Assessments and Judgments Based on a Body of Information (U) Confidence levels reflect the quality and quantity of the source information supporting judgment. Consequently, the FBI ascribes high, medium, or low levels of confidence to. assessments, as follows: (U) High confidence generally indicates the FBI's judgments are based on high quality information from multiple sources. High confidence in a judgment does not imply the assessment. is a fact or a certainty, such judgments might be wrong. While additional reporting and information sources may change analytical judgments, such changes are most likely to be refinements and not substantial in nature. (U) Medium confidence generally means the information is credibly sourced and plausible but not of sufficient quality or corroborated sufficiently to warrant a higher level of confidence. Additional reporting or information sources have the potential to increase the FBI's confidence levels or substantively change analytical judgments. (U) Low confidence generally means the information's credibility or plausibility is uncertain, the information is too fragmented or poorly corroborated to make solid analytic inferences, or the reliability of the sources is questionable. Absent additional reporting or information sources, analytical judgments should be considered preliminary in nature.. FASINTESNAUSS INLY UNCLASSIFIED/LAW ENFORCEMENT SENSITIVE- 9