If international law is all but irrelevant to international relations why do states spend so much time and effort justifying their actions under international law? The immediate reaction by many is to dismiss this as cheap talk, a rhetorical fig leaf or simple bluster of little consequence. This Article aims to debunk the notion that the rhetoric surrounding international law is of little consequence. Rather than mere cheap talk, the rhetoric of international law is at times used by great powers (and other states) in an attempt to gain tactical, if not strategic, advantages. This Article seeks to elucidate what is acceptable and what is not in modern diplomatic discourse and the relation of this acceptability to state practice. In this se...