His Willingness to accept the evidence that another theory is superior is a characteristic of scientific skepticism.
This is what is in psychology called cognitive complexity. Cognitive complexity allows us to imagine and construct many different scenarios and analyze certain behaviors and though are thinking processes find out what the causes for those behaviors are. This is a characteristic of how complex a persons perceptual skill is.
Bartolemeu Dias a nobleman of the Portugese household and a famous explorer. In 1488 he sailed a ship around the southern tip of Africa becoming the first European ever to do so.