I was ear-wigging a conversation between the Newhour presenter and duty editor yesterday: our presenter Mike Williams was questioning why, since the US Assistant Secretary of State for Africa Jendayi Frazer has used the phrase 'ethnic cleansing' to describe what's happening in some Kenyan provinces, we should be coy about using the phrase ourselves. A wider discussion amongst our programme team revealed mixed views about 'ethnic cleansing', as well as the word 'tribal'.