 Lamaane Bob Bosack iyo Sandy Lerner, oo labaduba ka shaqeynaya Jaamacadda Stanford, ayaa loo baahan yahay in ay isbarbar dhigaan shaqooyinkooda kala duwan oo ku yaal dhismayaal kala duwan, laakiin ma awoodaan sababtoo ah naqshadaynta cusub. 