"I don't know why people are trying to explain science to someone who pretends to be eagerly investigating, ..."

Of course, 'Iona' isn't investigating anything. She/he (?) knows the Answer already - 'it was God wot dun it' and all you need to know is in the Bible. What she/he and her/his fellow creationists are trying to do is to discredit that branch of biology which deals with evolution. It's a sort of anti-science. There's no such thing as 'creation science' - only 'creation anti-science'. No true scientist would ever start from the Answer and then look for information to support the Answer and seek to discredit any information that failed to support the Answer!