Fallacy
The philosophy of veganism is flawed because there is no way to be perfectly vegan.
Response
Veganism is the philosophical position that exploitation of and cruelty to sentient beings is ethically indefensible and should be avoided whenever it is possible and practicable to do so. Vegans themselves do not claim this position is absolute nor do they strive for perfection. Rather, the accusation that vegans fail to be vegan because they cannot be perfect is an external one imposed by people who do not understand veganism.
The term 'vegan' is defined as "a philosophy and way of living which seeks to exclude — as far as is possible and practicable — all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; and by extension, promotes the development and use of animal-free alternatives for the benefit of humans, animals and the environment. In dietary terms it denotes the practice of dispensing with all products derived wholly or partly from animals." The meaning of the word 'vegan' excludes the possibility of perfection, and vegans themselves understand they cannot hold their philosophical position absolutely. However, this understanding in no way prevents them from making significant, positive changes in the world by choosing not to harm other sentient beings when and where they can. Clearly, anyone who makes this same decision is 100% perfect in their veganism.
Issue Responses
Humor