However, even if the direction of selection does reverse in this way, traits that were lost in the past may not re-evolve in an identical form (see Dollo's law).
Hak id ijja awen, kuudeɣ as tisidik tan nefran war itimutti s immik wen , samalan wi asujjalnen a hin okayan war za udaben ahunin s dumu olahan ( ikyid aachareɣ wan Dollo)