I understand that the opening 1. d4 d5 2. c4 e6 3. Nf3 Nf6 is called Queen's Gambit Declined. But how about 1. d4 Nf6 2. Nf3 e6 3. c4 d5? There is no gambit offered, let alone declined. Is it still called Queen's gambit declined?
They reach the same position, so they have the same name. It wouldn't make sense to call the same position differently depending on the moves that lead to it. 1.f4 e5 2.e4 is a King's gambit, not a declined From's gambit. 1.e4 c6 2.d4 d5 3.cxd5 exd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 is a Tarrasch Defence despite having started as a Caro-Kann