their authors have probably spent more time in thought and Bible study
This is a worry. How can we possibly know how 'thoughtful', 'sincere' or 'into Bible study' an author is? Does it have to be based on personal acquaintance? Even if it was, how do you measure the length or quality of someone's thinking-time or Bible study time?
You appear to be saying that the way we should research and select our sources is on a subjective feeling about how thoughtful or sincere we feel they are. Is that really what you would advise the next generation of Christadelphians to do? You must see how short a step it is from that approach to; 'I'll select only the sources that agree with my particular theory on this verse'. It's not surprising to see discussion going round and round if it's ok just to select a view on subjective preference. No one can ever challenge anyone else's view on that basis, one man's subjective preference is as good as another's!
Trevor, you must realise by now what Fort (and others) are likely to think about your comment, I have to conclude either you're deliberately winding him up or you haven't really understood yet why he keeps responding to you the way he does!
This might seem like an over reaction to your comment, but the integrity of how we reach our conclusions is as important as the conclusions themselves, particularly when presenting to people who are going through an education system which is teaching them to critically assess arguments.
D