When a child realises that others may have beliefs that the child knows to be false the child ha developed?

When a child realizes that others may hold beliefs that they know to be false, they have developed a level of cognitive sophistication known as theory of mind. This understanding typically emerges around the age of 4 to 5 years and involves recognizing that others can have thoughts, beliefs, and perspectives different from their own. This cognitive milestone is crucial for social interactions, empathy, and navigating complex social situations. It reflects an awareness of the subjective nature of knowledge and belief.