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From: Thomas A. Russ on 27 May 2010 13:19
Paul Reiners <paul.reiners(a)gmail.com> writes:

> In the following Lisp REPL interaction:
>
> CL-USER> (defparameter *unison* 0)
> *UNISON*
> CL-USER> (member *unison* '(*unison*))
> NIL
>
> why is nil returned?

Well, the first step in debugging this would be to use the Lisp
interactive prompt to look at the parts:

What do you get from

'(*unison*)

Is it what you were expecting to get?
Then you can try

*unison*

and at that point it might become apparent to you why MEMBER (correctly)
returns NIL.

--
Thomas A. Russ, USC/Information Sciences Institute
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