Experts tend to be intuitive, automatic, and in their thinking.

strategic; flexible

Explanation:

Specialist is a professional who is dedicated to a specific field and usually knows a lot of a subject, be it related to science, art, engineering, politics, among others. These professionals often have to make key decisions and present key action plans in their area, so these professionals have many responsibilities and are important to the job market. Experts typically choose a primary area to specialize in, such as infrastructure, and a secondary area not to be so limited in providing solutions. In order to be able to handle all the responsibility you have, experts tend to be intuitive, automatic, strategic and flexible in their thinking.

answer; have joints that fail from excess by early the accumulated effects of unnoticed infections,all of these things are possible for a person born without the ability to feel pain;

answer; direct observation;