Premise: Jackson family . Performing as members of The Jackson 5 and as solo artists , the children of Joseph Walter and Katherine Esther Jackson were very successful in the field of popular music from the late 1960s onwards . As a group , the eldest sons Jackie , Tito , Jermaine , Marlon , Randy and Michael , made the family 's reputation , facilitating the subsequent success of siblings Rebbie , La Toya , and Janet .
Hypothesis: The Jackson family is a family of people without vocal chords.
Label: CONTRADICTION