No evolutionist can win this arguement... you're up against people whose fundamental belief systems allow for the existence of God and Satan, who can create and destroy anything, make one thing look like another, create life by sneezing, etc. etc.
Therefore, any evidence that you try to offer to prove evolutionism can always be refuted by "God/Satan made it look that way". There's nothing you can do to prevent that arguement.
Save your breath/time for debates about what the best modification for the 'tour is or something.
