WRONG. Yeast reproduces. It does not matter how little or how much you start with.
I said the percentage depends on the sugar content of the wine.
"During the primary fermentation,
the yeast cells feed on the sugars in the must and multiply, producing carbon dioxide gas and
alcohol. The temperature during the fermentation affects both the taste of the end product, as well as the speed of the fermentation. For red wines, the temperature is typically 22 to 25 °C, and for white wines 15 to 18 °C. For every gram of sugar that is converted, about half a gram of alcohol is produced,
so to achieve a 12% alcohol concentration, the must should contain about 24% sugars. The sugar percentage of the must is calculated from the measured density, the
must weight, with the help of a specialized type of
hydrometer called a
saccharometer.
If the sugar content of the grapes is too low to obtain the desired alcohol percentage, sugar can be added (
chaptalization). In commercial winemaking, chaptalization is subject to local regulations.
Alcohol of more than 12% can be achieved by using yeast that can withstand high alcohol. Some yeasts can produce 18% alcohol in the wine however extra sugar is added to produce a high alcohol content." - Wiki
It has to do with sugars, not how much yeast you add to the batch.
Which is because people did not have access to fresh grape juice. Grape juice was invented by Welch.
Yeast are a living organism, so how does that related to death? Furthermore, bread is made out of yeast as well.
You are assuming he made grape juice, not wine.