 While Grice used “conventional” to denote an implicature determined by linguistic meaning, W. Davis (1998: Chs. 5–6) and Lepore &amp; Stone (2015: Pt. II) argue that even conversational implicatures can be conventional in the non-technical sense in which it is conventional for women to wear a sari in India but not Mongolia, and for German speakers to use rot to mean “red” but not English  speakers.[13]  Conventions in this sense are common practices that serve a social interest, perpetuate themselves in certain ways, and are arbitrary in that other practices could have served the same purposes and perpetuated themselves. New speakers pick up conventions from prior speakers, often with no instruction. Consider (5):