The JW's feed off Watchtower literature, becuase Watchtower lost the literature battle on evolution in the 80's due to overwhelming evidence, despite the average JW not knowing this, the literature has gone cold on reasons why evolution is not true. The point I am making is that most JW's have arguments against evolution from christian literature in the 80's, based on pseudo science arguments from as early as the late 1800's.
Expect to hear that you cant trust carbon dating, but conquer that by stating that over 32 elements are now used to date and they all overlap. That the same science is used to dose all medications, especially radiotherapy and chemotherspy, if it was wrong science we would not be able to dose it. Also ask him how he thinks historians dsted the dead sea scrolls?
Expect him to say there are no fossils proving evolution and any that do are fake. The WT did a brochure on evolution about 4 years ago, it admitted to tonnes of evidence for evolution in fossils. It didnt say it like that, it was actually trying to be-little the evidence, but in doing so admitted the evidence existed. By the way there are now BILLIONS of fossils, they added a quote that said paraphrased "this century, there is enough evidence for evolution, to fill a train car" they just so happen to forget to note that quote was from the 1800's. Besides all this, we no longer need the fossils, BUT WE DO HAVE THEM, as all the data is stored in DNA anyway and it matches the evolutionary tree perfectly.. Also he will know nothing of ancestors of humans, non at all, they were told that neanderthals were humans with disease, despite DNA proving that false a long time ago
Dinosaurs is a weird one, some JWs believe they existed, some dont, depends ob the excuses they were given locally. He certainly wont believe they died 50 million years ago following 150 million years of exsistence.
Lastly expect ridiculous analogies about probability, based on no science or evidence. He wont know about complex molecules forming by themselves, such as carbohydrates forming in space, or nucleic acids, the building blocks of DNA forming from thin air (miller experiment) all because atoms and molecules have pos and neg charges so naturally come together and interact. The universe is one huge labratory. Bit he will tell you its like throwing airoplane parts from a plane and them forming a plane by accident in mid air. They have no concept of evolution.... that natural selection happens over hundreds of millions of years and that mutations offer natural selection the 'plane parts' continously. He wont know that we can see and even induce evolution in a species. If he is semi informed he may say he believes in micro evolution but not macro. This is easy to explain, they are the same thing, macro is just over a longer period of time.
Simply ask him to explain the theory of evolution, he wont be able to.... Maybe ask him if it makes sense to him or seems logical, when he says 'no' ask him how many textbooks he has read on evolution, when he says none... Ask him if it is logical why it does not make sense to him? He hasnt studied it!
snare xxx
oh and be prepared for "ok, so why is it just a theory?" ...... Of course science nomenclature is unique to science, gravity is a theory in science! Atoms are a theory! Theory = collection of evidence.