New proposals to tackle knife crime demonstrate just how little ministers know about the context our kids are operating in. Young people don't get involved with crime because they don't know the consequences; in many cases, it's precisely because they do know the consequences that they carry a blade. When you know just how bad a stab wound can be, you want to keep a knife close to your chest to have some credible threat of self-defence against others. This has been recognised by the government's own newly appointed lead on knife crime, Alf Hitchcock, who has said that 85%...