The phrase "in whole or in part" has been subject to much discussion by scholars of international humanitarian law. The International Criminal Tribunal for the Former Yugoslavia found in Prosecutor v. Radislav Krstic – Trial Chamber I – Judgment – IT-98-33 (2001) ICTY8 (2 August 2001) that Genocide had been committed. In Prosecutor v. Radislav Krstic – Appeals Chamber – Judgment – IT-98-33 (2004) ICTY 7 (19 April 2004) paragraphs 8, 9, 10, and 11 addressed the issue of in part and found that "the part must be a substantial part of that group. The aim of the Genocide Convention is to prevent the intentional destruction of entire human groups, and the part targeted must be significant enough to have an impact on the group as a whole." The Appeals Chamber goes into details of other cases and the opinions of respected commentators on the Genocide Convention to explain how they came to this conclusion.

Which phrase is especially contentious within international humanitarian law?