Open-Mind Test

• Good examples of behaviors - 'I may be wrong but...' is a typical closed mind unless followed by a question. - Ray Dalio, [1]
• Only on esperm gets in - Closed-minded people have trouble holding two thoughts simultaneously in their minds.

This reminds me of the memorable quote by Charlie Munger: “The human mind is a lot like the human egg, and the human egg has a shut-off device. When one sperm gets in, it shuts down so the next one can’t get in.”