https://cis.temple.edu/~pwang/AGI-Intro.html
Since each interpretation of "AGI" (except the naive one) has its own theoretical and practical values, they cannot replace each other, though can be compared and combined in certain situations.
http://exhibits.temple.edu/s/william-still/page/negro-spirituals
Negro spirituals were created and sung by enslaved Africans. The songs are very beautiful and contain coded messages used by enslaved Africans to convey hidden signals for escaping, hiding and expressing danger as well as discontent with slavery. (1) Oh Lord How Come Me Here Lord, how come me here? Lord, how come me here? Lord, how come me here? I wish I never was born There ain’t no freedom ...