"The bias against small beings seems closely related to another bias we have, namely the bias to believe what is most convenient. For it would no doubt be much more convenient if small beings such as insects are not sentient. If they are, and if they can feel pain, the world suddenly becomes very complex and messy, and not least full of suffering beyond what we have imagined thus far. Therefore, it seems reasonable to suspect that our reasoning is somewhat motivated to jump to the conclusion that insects are not sentient."