Pierce Butler, McLaughlin v. Pacific Lumber Co…
“ The Circuit Court of Appeals states that there is no evidence of double deduction or any specific instance of such deduction. But that absence of proof does not support the judgment. Respondent had the affirmative of the issue, and the burden was on it to show that allowance of the deduction claimed would not amount to twice subtracting the same loss. That is an essential fact which cannot be assumed. Respondent may not rely on mere assertion or speculation. ”
