premise: On the  1) Former guitarist John Frusciante returns to give the band a hint of their former jammy-jammin' glory; and 2) Rolling Stone is wildly positive (four stars), if completely alone in its enthusiasm--They've written a whole album's worth of tunes that tickle the ear, romance the booty, swell the heart, moisten the tear ducts and dilate the third eye (Greg Tate).
hypothesis: John Frusciante is no longer a guitarist because he is dead.