PARIS, Aug 2 — Simone Biles’s sixth Olympic gold medal hung around her neck, and so did a twinkling little goat — just a reminder to the gymnast hailed as the greatest of all time that she does indeed belong in the pantheon of sports greats.

“I was like, OK, if it goes well we’ll wear the goat necklace,” Biles said after winning a tense all-around final for her second gold medal of the Paris Games.