Robert Bryson Hall II,1990年1月22日—),以藝名Logic較為人知,是一名美国饒舌歌手、歌手、唱片制作人及作家。他出生于美国马里兰州盖瑟斯堡市。作为说唱团体RattPack的一员,近年来Logic在互联网上积攒了很高的人气并发行了四张正式混音带,而其中最近一张发行的《Young
mathematical introduction to logic 2nd, Boston, MA: Academic Press(英语:Academic Press), 2001, ISBN 978-0-12-238452-3 Gamut, L.T.F., Logic, Language, and Meaning
9th Annual IEEE Symposium on Logic in Computer Science (LICS), pages 176-185, 1994. [3] (页面存档备份,存于互联网档案馆) Summary of System F (页面存档备份,存于互联网档案馆) by Franck
Ferreira, F. and Wehmeier, K., 2002, "On the consistency of the Delta-1-1-CA fragment of Frege's Grundgesetze," Journal of Philosophic Logic 31: 301–11