What Does "Impartial" Mean?

Quite a number of years ago, I debated the topic of origins with three people on BBC Television while I was on a speaking tour of the UK.  One of those I debated was Professor Steve Jones, professor of Genetics at University College, London.  On the TV program, I remember asking Prof. Jones for the best example he could give for Darwinian evolution.  I remember him talking about some different species ofsalmon that had been observed to form in recent times.  I remember answering something...