Hi Mia, I do like the list part of this article, I never used yoke before (even did'nt know about it), now I will :-)

The 'c[a|d]+r' :-) functions in picolisp exist as a tribute for old lisper's, are'nt they? For beginners to (pico)Lisp I would prefer to define

(setq first        car)    # you can call it first-of-list  if you want
(setq rest-of-list cdr)   # rest would overwrite existing picolisp core function

For me it was easier to understand and to remember

: (first (rest-of-list '(1 2 3 4 5 6))    # same as (cadr '(1 2 3 4 5 6))
-> 2

: (rest-of-list (first '((1 2) 3 4 5 6))    # same as (cdar '((1 2) 3 4 5 6))
-> (2)

But for sure, (first (rest-of-list (rest-of-list (rest-of-list '(1 2 3 4 5 6)))) would never ever be used (and therefore never be listed under the 60 most used functions) instead of a simple (cadddr (1 2 3 4 5 6))
:-)

(By the way, both should return: 4)