OK.
AFAICS 'open mindedness' is a very complex concept within psychology. I don't have all the answers.
We all start from a set of beliefs and values which influence how we receive information. It is no coincidence that people buy newspapers which reflect or reinforce their own world view.
I don't generally buy newspapers at all, unless I've got a long train journey ahead and I need a half decent crossword to play with. I have no need to have my political opinions 'stroked' by like minded publications, or to have my hackles raised by what those of a different persuasion have to say.
In the 1990s when I first read of such exotica as interconnects costing hundreds of pounds, or cartridges costing thousands, I was originally dumfounded. Gradually I realised that there is merit in much, if not all of this stuff.
I recall a neighbour being utterly astonished when I told him a particular amp retailed at over £1k. He ranted about 'inflated prices' and 'waste of money' as we stood next to his £50k+ 4x4 which was at the time about as far 'off road' as it was going to get. IE, on his drive.
I went from initial disbelief about much hi-fi hyperbolae, to a kind of wide eyed acceptance of much of the bullshit and hype that I heard, though I was never sucked in by the obvious marketing led and highly rehearsed speil of the typical Linn/Naim dealer.
Gradually, I started to reign in my own enthusiasm so that now I am much more sceptical of a lot of claims, but still try to at least give things a fair hearing.
ISTM that the biggest thing we can all learn is to trust our ears and not be swayed by what others tell us, or what fashion dictates.
A friend of mine from primary and grammar school went on to become something of a leading light in psychology and particularly in the field of Consumer Psychology. Some of this stuff is interesting in itself but also sheds light on just how truly independent and therefore open minded our thinking is.
http://innovationbubble.eu/the-consumer-psychology-model-of-customer-experience-management-cem/
http://www.research-live.com/features/are-you-experienced?/4009152.article
http://jardindespsyches.co.uk/2014/07/what-shape-are-you-in/
Mull