A Study of “Wheat” and “Chaff” in Source CodeMartin Velez∗ Dong Qiu† You Zhou∗ Earl T. Barr‡ Zhendong Su∗ ∗ Department of Computer Science, University of California, Davis, USA† School of Computer Science and Engineering, Southeast University, China ‡ Department of Computer Science, University College London, UKEmail: {marvelez, yyzhou, su}@ucdavis.edu, dongqiu@seu.edu.cn, e.barr@ucl.ac.ukAbstract—Natural language is robust against noise. The mean- ing of many sentences survives the loss of word