But I haven't talked to a single mobster who would take Tony Soprano's life over Michael Corleone's.
There are mobsters who would take Tony Soprano's life over Michael Corleone's.  
mnli hypothesis: There are mobsters who would take Tony Soprano's life over Michael Corleone's.   premise: But I haven't talked to a single mobster who would take Tony Soprano's life over Michael Corleone's.