[Prime Choice]

Sounds like an urban legend to me. Corn doesn't/won't ferment. Whiskey has to be distilled from corn.

You could be right. I heard that story back in the '70s. Never bothered to look up whether it was confirmed.

[c-five]

Corn ferments and produces alcohol, same process as when apples turn into hard cider. That's only a step to producing whisky (or applejack). Distillation cleans it up and concentrates the active ingredient.