I had a 30 minute discussion with Mormon missionary lads about Genesis ( and other points) 2x this year. I explained to them that Genesis is a metaphor, not literal fact. They really don't think about stuff- perhaps more so than JWs, IMO.
the last story I always leave Mormons with--
2 LDS missionaries meet 2 Jws on the sidewalk-- each unsuccessfully tries to persuade the other that they have the "truth"
There are 3 three possible choices- do you know what they are? pause-
#1- the JWs are right and Mormons are wrong
#2- The Mormons are right and JWs are wrong
#3- do you know what #3 is? ( they usually act dumb, so I have to tell them)
Its, they are both wrong! Neither one has the truth!
Man does that go over like a lead balloon- but they need to think about that possibility.