Appearance of clarity. The patient reader of this column will not be surprised if I say that the current drama in the negotiations between the EU and Turkey was not unexpected. It is the cost of the tactic of the “obstacle course”: difficulties come one after the other, an ad hoc solution is sought each time and if an obstacle is too great and cannot be overcome, it is got round, a halt is called or speed drops while progress is made on other matters, until the next obstacle. It may be...