Chai's Blog

Found and liked this def­i­n­i­tion of expert in James Clear’s newslet­ter.

The physi­cist Niels Bohr on what it takes to be an expert:

“An expert is a per­son who has found out by painful expe­ri­ence all the mis­takes that one can make in a very nar­row field.”

The old­est source I could find was “Dr. Edward Teller’s Mag­nif­i­cent Obses­sion” in LIFE mag­a­zine. Sep­tem­ber 6, 1954.