It’s confusing since espresso is a type of coffee, and coffee (aka “drip coffee”) is a completely different type of coffee.
Coffee is both a class of item, and also a specific item within the class.
If you say coffee, it could mean the class of all kinds of coffee, or you could be referring specifically to the coffee item in the class coffee. If you say espresso, it’s still in the class coffee, but it’s a specific type of coffee that cannot be conflated with a different kind of coffee.
It’s confusing since espresso is a type of coffee, and coffee (aka “drip coffee”) is a completely different type of coffee.
Coffee is both a class of item, and also a specific item within the class.
If you say coffee, it could mean the class of all kinds of coffee, or you could be referring specifically to the coffee item in the class coffee. If you say espresso, it’s still in the class coffee, but it’s a specific type of coffee that cannot be conflated with a different kind of coffee.
English sucks.