OK, I have read the reasons - but I had read them previously.
Unfortunately, I still can't understand why the cumulative affect of the adjustments is to increase the raw readings in such a way that they almost exactly follow the Keeling CO2 curve. That makes it look as if the scientists who think the temperature rise is due to CO2 have adjusted the data to make it more like the CO2 curve. Then they claim that theory and observations match. Well, they will if you adjust them that way!
Even though I have re-read the reasons, I still have the same two unanswered questions:
1. Why don't the adjustments cancel out over time?
2. Why, when many adjustments will be for UHI, are the majority of temperatures adjusted upwards - adding to the apparent UHI effect rather than cancelling it out?
I expect you know so if you would be good enough to impart that information I would be grateful.
If you don't know, of course, why are you not sceptical, like me?