premise: Melinda Heather "Mindy" Cohn (born May 20, 1966) is an American actress, voice actress, comedian and singer. She is known for her role as Natalie Green, the student of Edna Garrett (played by Charlotte Rae) in the long-running sitcom "The Facts of Life", and for being the voice of Velma Dinkley in the "Scooby-Doo" franchise from 2002 to 2015.
hypothesis: Melinda Heather is known for playing roles in long-running sitcoms, however she also did voicing of Velma Dinkely before she was born.
reason: Someone can't do something before they are born, so the system isn't trained to understand this fact.