anchor.diff:  bif(is_atom, 1) -> true;
   bif(is_boolean, 1) -> true;
   bif(is_binary, 1) -> true;
  -bif(is_bitstr, 1) -> true;
   bif(is_bitstring, 1) -> true;
   bif(is_float, 1) -> true;
   bif(is_function, 1) -> true;
  
positive.code: bif(min,2) -> true;
  bif(module_loaded, 1) -> true;
  bif(monitor, 2) -> true;
  bif(monitor, 3) -> true;
  bif(monitor_node, 2) -> true;
  bif(node, 0) -> true;
  bif(node, 1) -> true;
  
negative.code: old_bif(is_atom, 1) -> true;
  old_bif(is_boolean, 1) -> true;
  old_bif(is_binary, 1) -> true;
  old_bif(is_bitstring, 1) -> true;
  old_bif(is_float, 1) -> true;
  old_bif(is_function, 1) -> true;
  