Why Elon Musk named his son [X Æ A-12 Musk] ?

 Elon Musk and Singer Grimes announced the name of the new born baby of Elon Musk. In a Interview he specify the content related to the name of his new born baby named [X Æ A-12 Musk]. He reveal the reality of this name given to his baby in which:

                                                 X: Unknown Variable

                                                Æ: Artificial Intelligence 

                                           A-12: Favorite aircraft SR-17 {no weapons, no defenses, only speed. Great                                                          in battle but no violent. {Favorite song Archangel}.

                                        

                                                                        Thank You