Ding! Ding! Ding! We have a winnah!
Step One: Claim that something reasonably to be expected in the fossil record is lacking and scientists are in a panic to explain why it isn't there. If that slides unchallenged, you win. If challenged, go to Step Two.
Step Two: Fossils seeming to show transitions don't mean anything.
Its the best response to the typical "if evolution is true where are all the transitionals?" question.
Just ask "well first what do you think a transitional would look like?"
And immediately they try and escape the topic for they know if they actually make their claim testable, ie put their ss on the line, it could very well be refuted.
I think the terms "half formed" and "useless" usually creep into the creos vocabulary at this point.