Injin is, according to my observations of him over a long period of time, an example of an individual suffering from an excess of left hemisphere activity, almost to the point of schizophrenia.
Such an individual is dominated by the left hemisphere which is why he excels at making complex semantic argumentation and espouses such a certainty about the nature of 'reality'**. In fact what he is espousing is the symbolic reality created in his left half, which appears to have gone unchecked by the other half for quite some time. McGhilchrist likens schizophrenia to a kind of hyper conscious, hyper-rationalism - existence almost entirely in an abstract symbolic reality, which ironically, is totally removed from actual reality.
I have also never encountered anyone with quite such an extreme denial of the existence of basic social phenomena, which also speaks to a right-side deficit.
But they don't actually exist, do they?
It's all very well going on about how my brain my or may not work, but if my statements are true then I'm not the defective one, am I? And they are true, as you know.
In any event you are bass ackward, I start from direct sense experience and reject stuff that I can't find within it, whereas the norm is to overlay sensory experience with socially approved fictions and chop bits off that don't fit.
Now I may be extremely wide of the mark here and there are many other explanations I am sure but the symptoms displayed certainly fit the description given by McGhilchrist.
** I'm aware of course that the same accusation would be laid by some against me as well
McGilchrist is trying the determinists route of excusing personal horror. His book is fascinating, but his conclusion is set in stone before he embarks, if you read the deep structure it's why he wrote the book to start with.
Alice Miller is much more relevent. http://www.nospank.net/fyog.htm
Find the right answer, realise you'll never see it in your lifetime, and then advocate it anyway because it's the right answer.
You've got to settle for second, third of fourth best in day to day life more often than not. There is no reason to accept anything but the best in your thinking, however. The only real personal issue is it requires you to completely give up on the idea that you will ever be all that free yourself. Accepting you can do nothing to sway tens of millions of people with muddleheaded notions any time soon is the first step to actually fixing stuff properly.