George Carlin, the influential comedian whose routines used profanity, scatology and absurdity to point out the silliness and hypocrisy of human life, has died. He was 71. Carlin, who had a history of heart trouble, died of heart failure Sunday in Los Angeles, according to publicist Jeff Abraham. Carlin went into St. John’s Health Center on Sunday afternoon, complaining of chest pain, and died at 5:55 p.m. PT. Carlin performed as recently as last weekend at the Orleans Casino and Hotel in Las Vegas, Nevada, and maintained a busy performing schedule, which included regular TV specials for HBO.