What Do You Mean, It's Not an Index?
Either the work or the audience
plays up something in the work as something it's clearly not (mostly).
In the show, it's often Played for Laughs
(see Does This Remind You of Anything?
), Rule of Cool
, or the writers just having fun. When it's the viewers, it can be Fan Dumb
, or it can be them legitimately assuming something if the show unintentionally makes the thing look like the trope.