University of Chicago philosophy and law professor Brian Leiter recently conducted a poll on his blog, Leiter Reports, that sought to measure the eating habits of philosophy students and teachers. More than 2,000 votes were cast. Here are some of the findings: Eight percent of respondents were vegans (a rate 10-20 times higher than the population at large); Twenty-five percent were vegetarians (a rate about 8 times higher than the population at large); Sixty-seven percent were carnivores; Yet, as one could expect given that the survey involves philosophers, things are more complex than they appear. Almost one-quarter of vegetarians, and one half of carnivores, said they had ethical doubts about their eating practices. Leiter suspects that the vegetarians with doubts think they really ought…