I remember slow dudes in boot camp, but in order for a dude to fail the whole ASVAB that muddafugga would have to be literally retarded. From what I recalled they were just testing aptitude. They were trying to determine how stupid were you and what kind of job that you could do. They really didn't give a fugg, because push come to shove they would just give a dude a broom, paint scrapper, a potato peeler, a pack and/or a gun and call it a day. Stupid and lazy people made it through boot camp from what I recalled. The people that didn't make it were the criminals, deviants or people that just completely mentally unstable and they had to be the dangerous type of unstable.
shyt amazes me but it opened my eyes to how diverse humanity is.