Kurdish Peshmerga forces detain suspected members of Isis on November 16
What should we call the world’s deadliest terrorist group? Should it be Isil, Isis, Islamic state, so-called Islamic State, or Daesh?
Like other news organisations, we at the Financial Times have debated which name to use and whether it matters. Politicians too have grappled with the question. France has settled on Daesh. David Cameron, British prime minister, now recommends the same.
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