152As regards the assessment by the European Union Courts as to whether there has been a manifest error of assessment, it must be stated that, in order to establish that the Commission committed a manifest error of assessment in assessing complex facts such as to justify the annulment of a decision which is contested, the evidence adduced by the applicant must be sufficient to make the factual assessments used in the decision implausible (Case T-380/94 AIUFFASS and AKT v Commission [1996] ECR II-2169, paragraph 59, and Case T-308/00 Salzgitter v Commission [2004] ECR II-1933, paragraph 138). Without prejudice to that examination of plausibility, it is not for the General Court to substitute its assessment of complex facts for that of the institution which adopted the decision (Enviro Tech (Europe), cited in paragraph 151 above, paragraph 47).
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