The U.S. Supreme Court case Irwin v. Gavit, 1924, revolved around the issue of taxation on a life estate bequest under an inheritance law. The respondent, Gavit, received income from a trust established by his late aunt's will which was divided into eight equal parts for her surviving siblings and their descendants. After the death of some beneficiaries, their shares were redistributed among the survivors including Gavit who argued that this additional income should not be taxed as it is part of his original inheritance - exempted from tax according to federal law at that time. However, the court ruled against him stating that only property transferred at death (principal) is exempt from taxation while any subsequent increase in value or income derived therefrom is taxable under federal law regardless if it results from redistribution due to other beneficiaries' deaths. This decision clarified how inherited properties and their incomes are treated differently for tax purposes.

In the dissenting opinion for Irwin v. Gavit, Justice Oliver Wendell Holmes Jr., joined by Justice Louis Brandeis, disagreed with the majority's interpretation of income tax law. They argued that a life interest in a trust should not be considered taxable income because it does not increase one's wealth or ability to pay taxes. Instead, they viewed such an interest as merely giving someone the use of property for their lifetime without actually transferring ownership or control over it. The dissenters believed that this interpretation was more consistent with both common sense and legal precedent about what constitutes "income." They also expressed concern that taxing life interests could lead to unfair results since people might have to pay taxes on money they never actually receive if the trust runs out before their death.