Why would Tesla have the "worlds best" engineering? I don't think I have ever seen anyone ever claim that except for perhaps Tesla PR representatives. How would

Why would Tesla have the "worlds best" engineering? I don't think I have ever seen anyone ever claim that except for perhaps Tesla PR representatives. How would you even measure "best" in such a field? Cheapest? Best quality? Best value-for-money? Safest? Highest power density?