I understand your point @NervesofSteel , and of course we know how carefully crafted Sally's words can be, but the doctor does describe Moth having CBD, in the way we have come to understand more about the disease. Some extracts:
‘The best thing I can do for you, Moth, is give you a diagnosis.’
‘I believe you have corticobasal degeneration, CBD. We can’t be absolutely certain about the diagnosis. There is no test, so we’ll only know at post-mortem.’
‘That must mean you’ve got it wrong then. It’s something else.’
The doctor looked at me as if I was a child; then he carried on trying to explain a rare degenerative brain disease ... and destroy his body and then his mind as he fell into confusion and dementia, and end with him unable to swallow and probably choking to death on his own saliva. And there was nothing, absolutely nothing they could do about it.
Sal then refers to CBD intrinsically as Moth having it, at other times.
Extracts from TSP:
Scene : near beginning of walk. Cast-iron bladder. CBD was supposed to cause incontinence, but certainly didn’t seem to have affected him so far.
Scene : where Exmoor meets the sea. Moth was tiring and finding every step a struggle. I was leaden and achy. It could have been our lack of fitness, the emotional exhaustion, the CBD, or maybe it was just the chips.
Scene : looking out to Mount's Bay. We should add ‘don’t get cold’ to the already extensive list of things to do to counteract CBD. What had the consultant said just three months ago?
CBD is intrinsic to the narrative and of course, if there was any doubt to be had, Moth tells the surfers he is dying.