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| Allegro CL

| 3 Evaluation and Compilation 3.1 Evaluation 3.1.1 Introduction to Environments 3.1.1.3 Lexical Environments ### 3.1.1.3.1 The Null Lexical Environment The null lexical environment is equivalent to the global environment. Although in general the representation of an environment object is implementation-dependent, nil can be used in any situation where an environment object is called for in order to denote the null lexical environment.

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