These may seem like rather insignificant views (compared to the proposed killing by God of 99% of living humans) - but these were two that even as a teenager I simply NEVER believed:
1) - the physical human heart could "think" like a second brain and lead a person into trouble.
2) - the biblical "creative days" were exactly 7,000 years each. Thus all humans are only about 6,000 years in total history, and the dinosaurs and myriads of other primitive extinct creatures have to be folded into about 48,000 years each.
I knew from simple science that both of these were complete and proveable BS.
As far as I know (and current JWs correct me please if wrong), neither of these has been formally retracted. They have simply been put way back on the hidden shelves of "old light" and are just not mentioned any more. Yes, an improvement (in a kind of cowardly way) - but how could a thinking 20th century religious leadership teach such bunkum in the first place???