In the 1995 cult classic “Clueless” (dir. Amy Heckerling), the audience hears the inner monologue of goodhearted but ditzy Cher (Alicia Silverstone) as she’s struck with the sudden realization that ...

Take a second to sit in silence. Is there chatter inside your head? Or is it relatively quiet in there? There’s a conversation making its way around TikTok about this inner voice — or lack thereof.