ramblings

According to my dictionary, vegan is "a person who neither eats nor uses any animal products". This got me thinking. I know that vegans don't use silk since it's an animal product but then would vegans use polyester since polyester comes, basically, from dead dinosaurs. Or maybe they [vegans] only avoid anything that comes directly from any animal so if the animal is dead for a few million years it makes no difference? I gotta ask a vegan this someday.