Welcome to issue 21 of THINK, which covers a very wide variety of topics. Kotzee and Smits' piece ‘Why Hobbits Cannot Exist’ presents one of the clearest explanations I have seen of an intriguing consequence of Saul Kripke's philosophy of language. Emily Thomas discusses Casper the friendly ghost – whom she thinks nicely illustrates the point that souls can be spatially located. Jonathan Harrison tells us some rather disturbing stories about what happens to a brain. There are also discussions of animal rights, immortality, consequentialism, Dawkins's The God Delusion, abortion and capital punishment. I myself briefly respond to Timothy Chambers's defence of the claim, often made by feminists, that rape is not a sex act. He will reply to my response in the next issue.