 The majority defined substantial evidence as evidence which "must do more than create a suspicion of the existence of the fact to be established.It is such relevant evidence as a reasonable mind might accept as adequate to support a conclusion, and it must be enough to justify, if the trial were to a jury, a refusal to direct a verdict when the conclusion sought to be drawn from it is one of fact for the jury.Associate Justice Hugo Black dissented, joined by Associate Justice Stanley Forman Reed.