A dissent written by Binnie J., with McLachlin C.J., Arbour, and Major JJ. concurring, agreed with the reasoning of the Federal Court of Appeal and were of the opinion that the engineered oncomouse is an "extraordinary scientific achievement" and an inventive "composition of matter" within the meaning of s.2 of the Patent Act. Additionally, Binnie J. stated that other jurisdictions with comparable legislation including the United States, Europe, Japan and New Zealand, among others, have held the oncomouse to be patentable.