premise: Stephen Colbert is banned from CBS.
hypothesis: Stephen Colbert . Colbert has hosted The Late Show with Stephen Colbert , a late-night television talk show on CBS , since September 8 , 2015 . Stephen Colbert (character) . This came after the real Colbert announced he would not be using the character when he replaced David Letterman as the host of Late Show on CBS in 2015 .