Secularism is categorically not saying that the religious may not speak out publicly or have a say in public life. It is about saying that religion alone should not confer a privileged say in public life, or greater influence on it. It really is as simple as that.

There is enough information capacity in a single human cell to store the Encyclopedia Britannica, all 30 volumes of it, three or four times over.

It sounds superficially fair. But it presupposes that that there is something in Christian theology to be ignorant about. The entire thrust of my position is that Christian theology is a non-subject. It is empty. Vacuous. Devoid of coherence or content. I imagine that McGrath would join me in expressing disbelief in fairies, astrology and Thor's hammer. How would he respond if a fairyologist, astrologer or Viking accused him of ignorance of their respective subjects?

Ironically, I originally wrote the tweet with Jews and thought, That might give offense. And so I thought I better change it.

Science shares with religion the claim that it answers deep questions about origins, the nature of life, and the cosmos. But there the resemblance ends. Scientific beliefs are supported by evidence, and they get results. Myths and faiths are not and do not.

Creationists and Holocaust deniers are both very similar - both are denying what is a perfectly manifest fact. In the case of Holocaust deniers it's more recent history, but in both cases the evidence - in favour of the Holocaust and evolution - is simply overwhelming. That doesn't mean they are morally or politically equivalent. But they are equivalent in denying history.

If you divide Christians into denominations, agnostics and atheists come in third, behind Catholics and Baptists. That's interesting when you contrast it with the lack of influence of nonbelievers.