We needn’t take things like reasoning on faith. We use reason because it works. And science isn’t really based on axioms: it’s not math. It’s based on a method that, refined over time, leads us to widely accepted facts about the universe: the facts that we can rely on to do things like establish the genealogy of species, cure disease, and land probes on comets. You can’t accomplish such things through prayer.

The different claims among these faiths have consequences, for they’ve produce endless misery over the course of history....Clearly, religions aren’t incompatible only with science: they’re incompatible with one another....This farrago of conflicting and irresolvable claims about reality stands in stark contrast to science.

Science in fact has a lot to say about the supernatural. It can and has tested it, and so far has found no evidence for it....Indeed, over its history science has repeatedly investigated supernatural claims and, in principle, could find strong evidence for them. But that evidence hasn’t appeared.

Putting all this together, we see that religion is like Sagan’s invisible dragon. The missing evidence for any god is simply too glaring, and the special pleading too unconvincing, to make its existence anything more than a logical possibility. It’s reasonable to conclude, provisionally but confidently, that the absence of evidence for God is indeed evidence for his absence.

I have to say that I find Ali’s argument truly revolting—not just because it’s intellectually weak and actually deceptive, but because it debases the entire realm of university scholarship of which I’m a member. When I see pieces like hers—lame apologetics that are meant from the outset to reinforce an opinion already held—I thank Ceiling Cat that I am a scientist: a member of the guild in which using your scholarship to reinforce emotional commitments is considered a sin.

Although this book deals with the conflict between religion and science, I see this as only one battle in a wider war—a war between rationality and superstition. Religion is but a single brand of superstition (others include beliefs in astrology, paranormal phenomena, homeopathy, and spiritual healing), but it is the most widespread and harmful form of superstition. And science is but one form of rationality (philosophy and mathematics are others), but it is a highly developed form, and the only one capable of describing and understanding reality.

Of course, atheism, which is merely the lack of belief in gods, isn’t responsible for explaining altruism and ethics, a task that properly belongs to philosophy, science, and psychology. And those areas have offered plenty of nonreligious explanations for the “Moral law” and altruism. The explanations involve evolution, reason, and education.