 But I was a little shocked that they would say that they had never heard of Spirit. I tend to think it would be hard for a person to remember if they did hear a song 50 years later. But they're different as well, and the song overall is nothing like Stairway to Heaven, but it is some sort of derivative work. Zeppelin beat the case in 2016, but it was appealed in 2018, revived, and then the U.S. Supreme Court could have heard it.