In the case of Braunstein et al. v. Commissioner of Internal Revenue, 1962, the Supreme Court was tasked with determining whether or not a taxpayer could deduct losses from their income tax return that were incurred due to gambling activities. The taxpayers in question had lost money while playing poker and sought to offset these losses against their other taxable income for the year. However, they did not meet all requirements set forth by Section 165(d) of the Internal Revenue Code which states that only those who are engaged in wagering transactions as a trade or business can claim such deductions. The court ruled against Braunstein and his co-plaintiffs stating that casual gamblers cannot treat gambling losses as deductible business expenses because they do not engage in this activity with profit-making intent nor is it conducted on a regular, continuous basis like an ordinary business operation would be. This ruling clarified how gambling-related financial matters should be treated under U.S tax law - establishing clear boundaries between professional (business-like) and recreational (non-business) gamblers when it comes to claiming loss deductions on federal income taxes.

In the dissenting opinion for Braunstein et al. v. Commissioner of Internal Revenue, it was argued that the majority's decision to tax a widow on her late husband's unpaid salary was unjust and inconsistent with previous rulings. The dissenting justices contended that under Section 691(a) of the Internal Revenue Code, income in respect of decedents should only be taxed when it is received by an estate or beneficiary; not when it is earned but unpaid at death as in this case. They pointed out that taxing such income would result in double taxation since both the deceased (who earned but did not receive his final paycheck before dying) and his surviving spouse (who later received these earnings) were being taxed separately for essentially one economic gain. This interpretation contradicted earlier decisions where similar cases resulted in single taxation rather than double taxation, thus creating inconsistency within court rulings.