why no implicit arguments for super inside define_method?

gistfile1.rb

# setup
class User
  def name; 'Bob'; end
end

class Object
  def wrap(method, &block)
    prepend Module.new { define_method method, &block }
  end
end



# Working example
class User
  wrap(:name) { 'I am ' + super() }
end

User.new.name == 'I am Bob'



# Failing example
class User
  wrap(:name) { 'I am ' + super }
end

User.new.name

RuntimeError: implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.