When you are told that carrots have human rights because they share half our genes — but not how gene percentages confer rights — wizard. When someone announces that the nature-nurture debate has been settled because there is evidence that a given percentage of our political opinions are genetically inherited, but they don’t explain how genes cause opinions, they’ve settled nothing. They are saying that our opinions are caused by wizards, and presumably so are their own. That the truth consists of hard to vary assertions about reality is the most important fact about the physical world. It’s a fact that is, itself,
Apart from universes – David Deutsch from Philosophy of Physics on Vimeo.