Arguments: - It's a conspiracy theories, and conspiracy theories are very catchy - The court documents and official explanations hang together and, Occams Razor, nothing further is required. Problems - He discounts Litvinenko's research because he worked for Berezovsky - He wrongly asserts that Litvinenko left FSB to work for Berezovksy in 1998, before the bombings. But Litvinenko was fired and jailed. Only helped by Berezovsky when he wanted to defect to UK - Takes official court docs on face value