Hi,

  In mail "Re: is_defined?"
  Navindra Umanee <navindra / cs.mcgill.ca> wrote:

> Out of curiosity, why doesn't this work:
> 
> irb(main):014:0> defined? defined?
> SyntaxError: compile error

Because second defined? does not have argument.

  ~ % ruby -e 'p defined?(defined?(nil))'
  "expression"

Minero Aoki