December 2017 Fiendish Function

The Fiendish Function posed during December 2017 had the following sample guesses and replies:

HTTP/1.1 500 Internal Server Error Date: Fri, 19 Apr 2024 06:01:04 GMT Server: CL-HTTP/70.217 (LispWorks; 2.1.7) Connection: close Content-Type: text/html; charset=ISO-8859-1 Transfer-Encoding: chunked Internal Server Error

Internal Server Error

No applicable methods for #<STANDARD-GENERIC-FUNCTION NUMBERS::APPLY-FN 22E249B2> with args (1 0 NIL 1 :QUADRATIC (1 0 1))

Identifont