Steve Shaw:
Singing from the same hymnsheet my arse. The peppered moth demonstrates a process that is involved in evolution but is a somewhat incomplete and imperfect example of it. If you're extrapolating from that that I don't think evolution occurs, well you'd better wipe that great big festering blob of bullshit off your hymnsheet the better for you to see the bloody words.

Thank you for your considered and 'polite' contribution.
Whilst the case of the peppered moth may not show a clear case of evolution, it does show how environmental changes may affect the chance of survival of one species in preference to another.
To state that both species already existed ignores the fact that they may have common forbears.
I was not 'extrapolating', merely showing an example of how 'natural selection' may favour the survival of one species over another.

It may be well, at this stage, to inform the discussion by giving Darwin's magnum opus its full title:
"On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life."

In further discussion of this matter I will try to avoid invoking the language of the gutter. I hope that you can do likewise.