Vegans don’t. We can’t know what is not told. Vegan isn’t about being a perfectionist. It’s about avoiding harm as much as possible. There’s nothing herculean about not eating a bag of chips because there’s milk powder in it, it’s just very frustrating when all the chips in the supermarket contain milk and you really wanted some chips.

“I can’t be perfect so I won’t try at all” is a lame ass argument.