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  ANSI Common Lisp   4 Types and Classes   4.4 Dictionary of Types and Classes

4.4.1 nil Type

Supertypes:
all types

Description:
The type nil contains no objects and so is also called the empty type. The type nil is a subtype of every type. No object is of type nil.

Notes:
The type containing the object nil is the type null, not the type nil.

Allegro CL Implementation Details:
None.

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