Now she wasn't so sure. Princess Nell's recent travels through the lands 
of King Coyote, and the various castles
with their increasingly sophisticated computers that were, in the end, nothing 
more than Turing machines, had caught her up in a bewildering logical circle. 
In Castle Turing she had learned that a Turing machine could not really 
understand a human being. But the Primer was, itself, a Turing machine, or so 
she suspected; so how could it understand Nell?