• consp object → generalized-boolean

• object - an object.
• generalized-boolean - a genralized boolean.

Returns true if object is of type cons; otherwise, returns false.

(consp nil) 

→

false



(consp (cons 1 2)) 

→

true



(consp '()) 

→

false



 ; ≡ (consp 'nil) ≡ (consp nil)

None.

None.

None.

These are all equivalent:

(consp object)
(typep object 'cons)
(not (atom object))
(not (typep object 'atom))
(typep object '(not atom))

None.