Zen Riddles of Booze

Tequila is a mescal but mescal is not a Tequila, Cognac is a Brandy but a Brandy is not necessarily a Cognac, Bourbon is a Whiskey but not a Whisky, Scotch is a Whisky but not a Whiskey.
If you understand all this you do not need to read the next installment. If you don’t, pour yourself a drink and read the next installment. Everything may not become clear but the headache will hurt less.