Thus, (2) it is an ad-hoc move of gargantuan proportions to introduce it here out of thin air and (3) believe this qualifies as an “explanation”. [numbers mine]
」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」」＜第２章　物質の構成粒子＞（教p19-）