Nix v. Hedden aids to the memory and understanding of the court. Gray acknowledged that botanically, tomatoes are classified as a "fruit of the vine"; nevertheless, they are seen as vegetables because they were usually eaten as a main course instead of being eaten as a dessert. In making his decision, Justice Gray mentioned another case where it had been claimed that beans were seeds — Justice Bradley, in "Robertson v. Salomon," 130 U.S. 412, 414, similarly found that though a bean is botanically a seed, in common parlance a bean is seen as a vegetable. While on the subject, Gray clarified the
Constitutional basis of taxation in Australia of no effect. Furthermore, laws imposing taxation (except customs duties or excise) shall deal with 'one subject of taxation only', while laws imposing customs shall deal only with customs, and laws of excise only excise. If a law containing a tax provision is found to include any non-tax provisions, the court will render the non-tax provisions inoperative. In practice, if the tax provision is introduced in an amending instrument, the court will most likely strike down the amending instrument rather than render the entire law inoperative, this is what occurred in "Air Caledonie International v Commonwealth". The purpose of this