>>776385
Impossible unless they pressed the grape juice fresh before drinking it, which could theoretically be done within a week of harvesting season.
The yeasts fermenting the grapes grow commensally on the grapes themselves 9the little dust layer on grapes you see, that's yeast).
As soon as grapes are pressed, the fermentation kicks in.
It's impossible to keep grape juice non-alcoholic without first boiling it and then keeping it refrigerated.
>>776389
>Unbeknownst to them it had the effect of killing off bacteria
This only works with beer brewing.
Wine has too low of an alcoholic percentage to kill off bacteria on its own, let alone when it gets diluted.
Heck, if this were true we couldn't make vinegar since you get this by bacterial oxidation of alcohol into vinegar (and some bacteria oxidizing sugars directly into vinegar).
Beer on the other hand needs to be boiled during the brewing process, so any bacteria in it get killed.
>>776415
>You think the apostles didn't know the difference between juice and wine?
Thing is, there's no real word for fruit juice in ancient languages because well…shit didn't exist.