I'm referring to the fundamental idea in AI of knowledge representation. Lisp is ideal for chapters 1 through 4 of AIMA, and TensorFlow has shown that NN can be solved well with a domain specific language which lisp is known to be great for.

In fact, the first edition of AIMA even had a NN and Perceptron implementation in Common Lisp. (https://github.com/aimacode/aima-lisp/blob/master/learning/a...)