1 files changed, 2 insertions, 30 deletions
diff --git a/lib/person.rb b/lib/person.rb
index a40efbe..8571754 100644
--- a/lib/person.rb
+++ b/lib/person.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative 'nil_person'
+
 class Person
   attr_accessor :name, :gender, :spouse
 
@@ -25,33 +27,3 @@ class Person
     "#{name} (#{gender})"
   end
 end
-
-class NilPerson
-  def name
-    nil
-  end
-
-  def father
-    self
-  end
-
-  def mother
-    self
-  end
-
-  def gender
-    nil
-  end
-
-  def ==(other)
-    other.is_a?(NilPerson)
-  end
-
-  def eql?(other)
-    self == other
-  end
-
-  def to_s
-    ''
-  end
-end