By Jonathan Freedland, April 18, 2011
Can you walk and chew gum at the same time?
Can you do - or think - two things at once? I only ask because I am beginning to wonder if it's a rarer feat than I'd realised.
Here is what I have in mind. Last week, I wrote a column in the Guardian about the Goldstone affair, triggered by the semi-retraction that the South African judge had delivered a few days earlier.