A finding of fact made by a jury or an administrative agency in the context of APA adjudication or formal rulemaking will be normally upheld on appeal unless it is unsupported by "substantial evidence." This means something "more than a mere scintilla" of evidence. It means such relevant evidence as a reasonable mind might accept as adequate to support a conclusion." Under the "substantial evidence" standard, appellate review extends to whether there is any relevant evidence in the record which reasonably supports every material fact (that is, material in the sense of establishing an essential element of a claim or defense). Appellate courts will not reverse such findings of fact unless they have no reasonable basis in the evidence submitted by the parties. In other words, they will not reverse unless no one submitted any testimony, documentation, or other evidence which directly or indirectly (i.e., through reasonable inferences) supports a material fact, thereby implying that the finder of fact must have engaged in impermissible speculation with no reasonable basis in order to reach a verdict. If the parties presented conflicting evidence, appellate courts applying a "substantial evidence" standard assume that the jury or administrative agency resolved the conflict in favor of the prevailing party, and in turn, appellate courts must defer to such implicit findings about which side's witnesses or documents were more believable, even if they suspect they might have ruled differently if hearing the evidence themselves in the first instance. This is a highly deferential standard.