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| ANSI Common Lisp 5 Data and Control Flow 5.3 Dictionary of Data and Control Flow
5.3.37 identity | Function
  Syntax: identity object object Arguments and Values: object - an object. Description: Returns its argument object. Examples:
       (identity 101)  101
       (mapcan #'identity (list (list 1 2 3) '(4 5 6)))  (1 2 3 4 5 6)
  Notes: identity is intended for use with functions that require a function as an argument. `(eql x (identity x))` returns true for all possible values of x, but `(eq x (identity x))` might return false when x is a number or character. identity could be defined by
      (defun identity (x) x)
Allegro CL Implementation Details: None.

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