Green thinks the slogan breaks ASA guidelines, saying "Advertisements are not allowed to mislead consumers. This means that advertisers must hold evidence to prove the claims they make about their products or services before an ad appears."
Here's Stephen's logic - since you can't provide evidence for there being no God, you're misleading consumers, probably or no probably. But it wouldn't be misleading to say there is a God, as he explains:
"There is plenty of evidence for God, from peoples' personal experience, to the complexity, interdependence, beauty and design of the natural world. But there is scant evidence on the other side, so I think the advertisers are really going to struggle to show their claim is not an exaggeration or inaccurate, as the ASA code puts it."
Green's complaint has elicited a fantastic response from the British Humanist Association's chief executive Hanne Stinson, who told the BBC:
"I've sought advice from some of our key people here, but I'm afraid all I've got out of them so far is peals of laughter. I am sure that Stephen Green really does think there is a great deal of evidence for a God (though presumably only the one that he believes in), but I pity the ASA if they are going to be expected to rule on the probability of God's existence."So they're not taking Green seriously then? Which brings me to my usual question on this matter - why is the BBC still taking him seriously?