   end
 
   @doc """
-  Returns true if `term` is either the atom `true` or the atom `false` (i.e. a boolean);
+  Returns `true` if `term` is either the atom `true` or the atom `false` (i.e. a boolean);
   otherwise returns false.
 
   Allowed in guard tests.

  end

  @doc """
  Returns true if the local node is alive; that is,
  if the node can be part of a distributed system.
  """
  @spec is_alive :: boolean

  end

  @doc """
  Returns `true` if left is less than right.
  Like Erlang, Elixir can compare any term. Allowed in guard clauses.

  ## Examples
