It used to be that vegans argued amongst themselves about things like whether or not it was OK to eat honey... until a few years ago when people online started to talk about how sea cucumbers are vegetables. 'Sea cucumbers are cucumbers', they said. Liberal vegans started to talk about how they were a great source of protein for vegans. When 'proper' vegans told them they were wrong, that sea cucumbers were animals and were not at all appropriate food for vegans (and besides cucumbers are fruits) the liberal vegans went ballistic.