What is considered substantial evidence in the context of a decision by the Commissioner of Civil Justice?

"The district court reviews the Commissioner's final decision for substantial evidence, and the Commissioner's decision will be disturbed only if it is not supported by substantial evidence or is based on legal error." Hill v. Astrue, 698 F.3d 1153, 1158-59 (9th Cir. 2012).

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Substantial evidence is such relevant evidence as a reasonable mind might accept as adequate to support a conclusion. Osenbrock v. Apfel, 240 F.3d 1157, 1162 (9th Cir. 2001); Sandgathe v. Chater, 108 F.3d 978, 980 (9th Cir. 1997).