Via Benny Peiser's estimable newsletter, one of his readers has pointed to a perfect exposition of the Unfalsifiable Theory on the BBC website:
Dr Mark Eaton, an RSPB scientist, said: "We feared the numbers of red-throated divers might drop because the warming of the North Sea seems to be reducing stocks of the fish they feed on.Let's just paraphrase that: Fish might thrive, or they might not. Either way, climate change will be to blame, and either way it will be a bad thing.
"The black-throated diver could also be at risk in the future, despite the recent increases. If climate change causes loch temperatures to rise, the small fish the birds feed on could grow too large to eat."