>>37264
>And absent human presence, there are no plant diseases at all?
No, but there are and the consequences of the industrial revolution have left their mark for the time being.
>The toxin is the cause of disease. The toxin has a quantity, a mass, concentration, etc. Everywhere substances are observed to change their biological effect, including toxicity, according to dose. One concentration of snake poison does not have the exact same biological effect as another concentration. You yourself accept this in the case of lead, the different quantity, high in one case and zero (but tiny in your case as you deny atoms) in homeopathy, has a different impact, the higher quantity's is stronger. The quantity of lead got divided and so did the strength of its effect.
So it's limited in size?
>exclusively the toxin
Now what are you talking about? I never said that it's exclusively caused by the toxin, I'm saying that the effect of coffee rust being identical is explained via it being a detox procedure by the fungus in specific, like malaria within humans by its parasite.
>Which parasite? Give me its name.
Plasmodium parasites, which cleans the blood-stream in a detox procedure via targeting contaminated red-blood-cells.