Alex Massie provides one:
Muddling through doesn't sound very heroic and it's not a very noble thing to die for. But our Afghan policy is, in some ways, defined by negatives: it's hard to say what victory looks like, but defeat is easier to recognise. We may hope that our troops in Helmand can do some good but perhaps their main role is to prevent things from getting worse. As I say, none of it is satisfactory and much of it is pretty grim. But that's where we seem to be and it's not clear, to me at least, that the choices are quite so clear as some suggest, nor that, as others argue, the act of chooing is more important than the actual choice that's made.