Goldacre's considered post-Newsnight response.
To quote Ben quoting Vaughan:
You know that awkward feeling you get when you stop laughing because you realise the person you're talking to isn't actually joking?Er, yes. Single jabs vs MMR?
Dr Aric Sigman looks respectable but is in reality a scary idiot. Goldacre looks the opposite but is entirely respectable.
Gawd help us when we can't tell the difference.