How can a song be Tupac after he died?

A song cannot be Tupac after he died because Tupac is a person and songs are not people. Songs can be written about Tupac or inspired by him, but they are not Tupac himself. After Tupac's death in 1996, new songs featuring his vocals have been released using previously recorded material or with the help of technology such as artificial intelligence. These songs may be credited to Tupac, but they are not new creations in the same way that songs released during his lifetime were.