A lisp implementation that is compliant with the ANSI standard needn't have
a package named LISP at all.
Maybe so. It's very hard, at least for me, to digest over 1,000 pages, any
one of which can undermine what is said on any other.
But why, if you are right, is the enumeration of the symbols external to the
LISP package stated so early, i.e., on page 1-30, among the very first
concrete technical assertions in the ANSI standard? HyperSpec\Body\sec_1-9.html
I quote from that section of the standard:
1.9 Symbols in the COMMON-LISP Package
The figures on the next twelve pages contain a complete enumeration of the
978 external symbols in the COMMON-LISP package.