The point at which we fully acquire our humanity, and our capacity to suffer, remains an open question, but anyone who would dogmatically insist that these traits must arise coincident with the moment of conception has nothing to contribute, apart from his ignorance, to this debate. -- Sam Harris Water is two parts hydrogen and one part oxygen. This seems as value-free an utterance as human beings ever make. But what do we do when someone doubts the truth of this proposition? Ok, all we can do is appeal to scientific values. The value of understanding the world. The value of evidence. The value of logical consistency. What if someone says, "Well, that’s not how I choose to think about water." Ok, what can we say to such a person? Ok, all we can do is appeal to scientific values. And if he doesn’t share those values, the conversation is over. Ok, if someone doesn’t value evidence, what evidence are you going to provide to prove that they should value it? If someone doesn’t value logic, what logical argument could you provide to show the importance of logic? -- Sam Harris, during a Notre Dame debate with William Lane Craig