:s.respond_to?(:dup) && :s.dup raises

[François Beausoleil]
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 

[Tim Hunter]

Anyway, my feeling is that Symbol and Fixnum (probably Numeric) should
not respond_to?dup).

Here's a 76-post thread on this very subject, from about six, seven
weeks ago.

http://blade.nagaokaut.ac.jp/cgi-bin/vframe.rb/ruby/ruby-talk/239426?239426-239938