Who said "The really tough thing is to admit what you don't know."?

This quote is attributed to John Wayne.

The really tough thing is to admit what you don't know. - John Wayne

"The really tough thing is to admit what you don't know."

John Wayne Knowledge

Actor American 1907–1979

"Courage is being scared to death, but saddling up anyway."

"Life is hard; it's harder if you're stupid."

"Tomorrow is the most important thing in life."

"All I have to do is divine will, not my own."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."