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Nil is a sequence.
This is a nit discovered due to a typo:
Error: NIL is not a sequence.
Error signalled by SYSTEM:SHARP-A-READER.
Broken at READ. Type :H for Help.
I am reasonable sure (upon careful exegesis of p.357) that my typo
should have produced a vector of size zero. [If not persuaded,
consider (make-array 0 :initial-contents ())]
Even if this interpretation is not right, the error message lies.
NIL is most surely a sequence, because it is a list. The first
paragraph in p. 245 says that explicitly.
Cesar Augusto Quiroz Gonzalez
Department of Computer Science ...allegra!rochester!quiroz
University of Rochester or
Rochester, NY 14627 firstname.lastname@example.org