`dotted-list?``x`procedureTrue if X is a finite, non-nil-terminated list. That is, there exists an N >= 0 such that cdr^N(X) is neither a pair nor (). This includes non-pair, non-() values (

*e.g.*symbols, numbers), which are considered to be dotted lists of length 0.(not (dotted-list? X)) = (or (proper-list? X) (circular-list? X))