Here's why:
* Privacy: Celebrities are generally private about their personal grooming choices, including the use of hairpieces. There's no official confirmation from Redford or his representatives on the matter.
* Hair Evolution: Redford's hair has naturally thinned with age, which is a common occurrence for men. It's possible that some styling techniques or hair products were used to manage his hair in certain films.
* Makeup and Lighting: Movies often use makeup and lighting techniques to enhance actors' appearances, making it hard to determine what's natural and what's enhanced.
Ultimately, it's a matter of speculation. Whether Redford has worn a hairpiece or not is a detail that's probably only known to him and those close to him.
It's important to remember that focusing on physical appearance is less important than appreciating Redford's remarkable talent and contributions to the film industry.