How many hours does a full stomach effect alcohol intensity?

Let’s imagine 3 biologically identical triplets (cisM) are invited to a small comfortable studio-like laboratory at 4pm. The scientist says they will each receive exactly 1/3rd of a 15 inch pizza at 7pm and they must eat reasonably quickly when served. The scientist also provides each triplet with three shots of whisky that they can drink at any time from 4pm to 2am. The first triplet takes his whisky at 6pm and is really drunk having not eaten since 1130am that day. The second triplet drinks the whisky at 8pm and isn’t very drunk at all because he finished his pizza at 735pm. ~How many hours must the third triplet wait to drink to get *exactly as drunk as the first triplet?*~