Incidentally John seems to consistently underestimate of the importance of subjective reality.
Here, by "subjective reality", I mean the objectively very subjective aspects of reality (if you know what I mean).
This is unfortunate, because I think it's quite reasonable to say that the most important things in life are all subjective.
"I am very happy," says Angela. Would it not be very peculiar to reply, "Ah, but that is unimportant, Angela. Happiness cannot be objectively measured."
Yes, indeed that would be very peculiar. The things that matter most in life - like happiness, love, peace, beauty - are all in fact subjective experiences.
In turn, the most powerfully objective aspects of our reality tend to turn out to be quite uninteresting. If I were to make the most objective statements possible about myself, I might say:
"I weigh 65.3 kilograms. I am 1.75 metres tall. 61.8% of my body weight is actually water. I have two hands, two eyes, ten fingers, ten toes and a nose."
Soooooooo what?