Premise: I'm not sure if the correspondents realize that the Hindu concept of Brahman has been around considerably longer than Sullivan's cross-pollination of something like the  a powerful (yet devout) bearded man, a cool breeze on a clear summer night, a John Lennon tune, and the Lion King.

Hypothesis: I'm not sure that the current correspondence realize that the Hindu concept of Brahman has been around.
Relation: entailment