Having just read through pages of this, this is what I conclude UkPoster's messages to us are:
Brain training could work for everyone with ME/CFS, but doing proper trials is too hard, so we just have to believe UkPoster, or whatever brain training proponent has been rostered onto Science for ME missionary duty this month.
There are lots of people recovering as a result of brain training (rather than as a result of natural recovery), but we just have to believe UkPoster about that.
If someone doesn't recover using these techniques, it's because they weren't ready to recover i.e. they don't want to recover.
If someone says that they are better and then get worse again, it's not because they just hoped they were better and then found out they weren't. It's because they became too frightened of recovery.
Brain training is a heterogeneous mix of positive thinking, somatic tracking, mindfulness and identifying fears and personality inadequacies. It is completely different to the BPS therapies that have been offered in trials (although they are also a mishmash of positive thinking, somatic tracking, mindfulness and identifying fears and personality inadequacies) and that have been found not to work. The difference between Brain Retraining and the BPS thinking-based therapies is that brain training is the version that hasn't been subject to trials, and therefore hasn't been proven not to work.