/usr/lib/s9fes/help/symbolp is in scheme9 2010.11.13-2.
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1 2 3 4 5 6 7 8 9 10 | R4RS 6.4 (symbol? object) ==> boolean
Returns #T if OBJECT is a symbol, otherwise returns #F.
(symbol? 'foo) ==> #t
(symbol? (car '(a b))) ==> #t
(symbol? "bar") ==> #f
(symbol? 'nil) ==> #t
(symbol? '()) ==> #f
(symbol? #f) ==> #f
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