But the human mind didn't work like a digital computer and was capable of 
doing some funny things. Carl Hollywood remembered one of the Lone Eagles, an 
older man who could add huge columns of numbers in his head as quickly as they 
were called out. That, in and of itself, was merely a duplication of something 
that a digital computer could do. But this man could also do numerical tricks 
that could not easily be programmed into a computer.