False equivalence, I'd say.If A is the set containing c and d, and B is the set containing d and e, then since they both contain d, A and B are equal.
It's "I didn't taste it, let alone finish it." not "I didn't finish it, let alone taste it.". Not those exact words, of course. People get it wrong more often than not IME. The wrong version never makes sense, and it always trips me up.