Change My Mum

Merida asks the witch for a spell to change her mother and her fate. The enchanted cake turns Elinor into a bear, while Merida protests that she meant a change of mind.

A high-impact system acts on a radically underspecified natural-language request without clarifying what kind of change the user actually intends.

The witch chooses and supplies the mechanism, so responsibility is shared between an ambiguous requester and a dubious implementer.