I have been doing some research about veganism and human logic. My conclusion is that logic supports a vegan lifestyle!
Here is the best summary I found so far:
Vegans are logical. Vegans are the ones scratching their heads saying: um… wait… THAT doesn’t make sense. That needs examining. Like humans are equal, shouldn’t all animals be EQUAL to each other? Why do humans decide their worth? Why are dogs more important than cows? Why are pigs less important than horses?
Source:
http://www.chicvegan.com/why-veganism-is-logical/