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<?php 
  /*======================================================
  =            Enable comments and validation            =
  ======================================================*/
  wp_register_script('jquery-validate', get_template_directory_uri() . '/js/jquery.validate.min.js', array('jquery'), '1.9', true);
  wp_register_script('jquery-validate-comments', get_template_directory_uri() . '/js/jquery.validate.comments.js', array('jquery', 'jquery-validate'), '', true);

  if (is_singular() && comments_open() && get_option('thread_comments')) {
    wp_enqueue_script('comment-reply');
    wp_enqueue_script('jquery-validate');
    wp_enqueue_script('jquery-validate-comments');
  }
?>