Question 9) Food cannot be conjured (One of Five Exceptions to Gamps Elemental Law of Transfiguration). Why then in Book 4 can Mrs. Weasley slammed a large copper saucepan down on the kitchen table and began to wave
her wand around inside it. A creamy sauce poured from the wand tip as she stirred.?
How does Ollivander manage to produce wine from Harry’s wand?
How does Dumbledore conjure gin (Pensieve Book 6) and mead (Dursleys home book 6)?
How does Fudge conjure whiskey (10 Downing Street, Book 6)?
How does Umbridge conjure different drinks when trying to interrogate Harry? (DADA Office, Book 5)
(there were other examples, but I can’t think of them offhand)
How does the Aguamenti charm work?
It could be that charms are different, and Aguamenti and Avis are charms, not transfiguration. Dumbledore and Fudge may have magically transported the alcohol somehow, not conjured it from scratch (Note “Madam Rosmerta’s finest”). Doesn’t answer everything, though.