It seems obvious that the mind loves an neat conclusion to events, like a story with a satisfying ending, as opposed to an ambiguous one that leaves you pondering for a while. Or the part of a song that keeps looping (ear worm) until you play it out in full, or get distracted by something else.
As I've got older though, perhaps due to experience (a larger data set) or understanding (passive introspection), I've become able to tolerate ambiguity a lot more, seeing the world as a vast shade of grey rather than black and white.
Or perhaps my brain is simply malfunctioning(?). Replacing 'hard' boundaries with 'soft' ones, so that my life is no longer a series of striking events but rather a pastiche of recurring themes.
This doesn't seem to be a normal progression in any case. I see plenty of people older and more experienced than me blindly stuck in negative thought patterns, or trying to fit their experiences into boxes labelled black or white.
Ulimately, I believe there is some underlying (physical/chemical) cause for our differences, and the results of this study might be part of the puzzle. But just as whole genome sequencing hasn't led us to a full understanding of the human body (yet), I wonder just how far we've got to go before we have a universal understanding of our mental processes.