Style, "Authentic" Substance?

from Google AI:

A paracosm is a detailed, self-sustaining imaginary world created in childhood or early adolescence that features its own unique geography, history, languages, and inhabitants. [1, 2, 3]

Key Characteristics

Origin: Most paracosms begin spontaneously during childhood (around age 8 to 12). [1, 2]
Complexity: They go far beyond simple pretend play by including structured rules, political systems, maps, and histories. [1, 2]
Distinction from Reality: Creators clearly understand the difference between their imaginary world and the real world. [1]
Longevity: While most fade away as the creator grows older, a small percentage persist into adulthood—often among writers, artists, or deep world-builders. [1, 2]

Common Examples

Literature: J.R.R. Tolkien’s Middle-earth, C.S. Lewis’s Narnia, and the fictional worlds of Gondal and Angria created by the Brontë sisters. [1, 2]
Art and Film: Henry Darger’s Realms of the Unreal or Mark Hogencamp’s Marwencol. [1]

Functions and Psychology

Coping Mechanism: They can act as an emotional refuge or a way to process stress, loneliness, or trauma. [1, 2]
Creative Potential: They are frequently linked to high childhood creativity, problem-solving skills, and future artistic or writing careers. [1, 2]
Terminology: The word combines the Greek prefix para- (beside or beyond) and cosmos (world or universe), and was coined by Ben Vincent during a 1970s study on childhood fantasy. You can read more about its history and traits on Wikipedia and Pluralpedia. [1, 2, 3, 4]

Profilicity: Genuine Pretending