But you can fool it by first asking chatGPT if it can write in the style of some known author, letting it output an example, then asking it to write about a given topic in the same style.
Here's generic output to "write a one paragraph description of Genghis Khan". The Hugging Face output detector says it's 99.98% likely to be fake (from GPT):
> Genghis Khan was a Mongolian warrior and ruler who founded the Mongol Empire, one of the largest empires in history. He is credited with uniting the nomadic Mongol tribes and establishing a powerful and efficient military force that conquered much of Asia and Europe in the 13th century. Genghis Khan is known for his strict code of law and his innovative use of cavalry and military strategy. He is also remembered for his brutal treatment of conquered peoples, as he and his armies were responsible for the deaths of millions of people during their conquests.
But this response, in the style of Charles Bukowski, gets a 98.66% real (not GPT) rating by the checker:
> Genghis Khan was a man of fire and fury, a conqueror who swept across the land like a storm. His armies were vast and unstoppable, crushing all who opposed him beneath their hooves. He was a man of vision and determination, who united the scattered tribes of the steppes and forged them into a mighty nation. But he was also a man of blood and death, who left a trail of destruction in his wake. Villages were burned and pillaged, their inhabitants slaughtered or taken as slaves. The world trembled at the mention of his name, and even the greatest kings and emperors bowed before him in fear. Such was the power of Genghis Khan, the greatest warrior the world had ever known.