Never give it up, provide straightforward & simple scientific reasoning and stress your missionary to respond with the same logical reasoning. He cant do it on the next 5000 years. How can Noah load all 100 billion species of plants and animals in one ship (bible says it's a boat) at a time. First the whole two of every animal male and female. How could that be possible, not only is it a pain to gather up EVERY animal, but two of each sex. How this is possible. How long would it take a group of 100 people today to do that? He was one man. Now lets say that the animals just mystically all came on there own. How did he feed them? How did he know what animals were coming and what they ate? I read something about not being able to eat animal flesh back then so what would Noah do for the animals that ate flesh. Where did he get all this food from what happened if Noah missed some animals, they must be extinct now? Maybe some of the animals died upon the ark and now are gone completely. Did he bring every breed of every species? So he brought every type of every animal wow he is good. The biggest ship today cant even hold the weight that Noahs ark must have had. It was a wooden ship carrying, who knows how much weight. All the supplies, the food for not only him and his familybut for the animals, and of course the creatures themselves.
