Peng Ping is a computer programming expert and Yao Xin is a mathematician. In fact, all computational programming experts are mathematicians. We know that most comprehensive universities in China today are training computer programming experts. Based on this, we can consider:. ['Peng Ping was trained by a comprehensive university.', 'Most computer programming experts are trained by comprehensive universities.', 'Yao Xin is not a graduate of a comprehensive university.', 'Some mathematicians are computer programming experts.']