to Dave (continued)
Our human understanding of what is 'true' – or what is 'reality' – grows as we grow - both individually and collectively. Probably most of the time what we understood to be true is contained in our growing understanding; sometimes not. And what we are capable of knowing NOW might need to change as we grow in capacity to understand.

I personally think that applies to us as a Church, also. There was a - very long - time when we considered slavery to be quite moral and OK. Gradually we came to realize that treating a person as property was morally evil. Right now we are being asked to change opinion on the morality of capital punishment. We have always used it and approved of it. But is it really moral?

So, yes, it is possible that new knowledge may contradict a former teaching and doctrine. Usually the Church has wisdom enough to explain why and how our knowledge grew. But that is what being a 'Church' is all about. We are all in this 'seeking wisdom' task together.