amboo7

"Just kidding: mathematics is a fascinating subject, but you won’t need much of it for now."

The whole book: http://www.usingcsp.com/

By Goedel's incompleteness theorem.

It is the so-called empty function, which diverges, e.g. throws an exception if called.

I taught my daughter, when she was 4, to multiply m*n by drawing m parallel lines intersecting n parallel lines, then counting the intersections as the result. Etc., as I am a nerd, we discussed fun problems from time to time. Seven years later she won a trophy at the national level.

In case Common Lisp is mainstream: https://www.researchgate.net/publication/279847876_A_DSEL_fo...