The levels are about potential, not ability. The tests are not pass/fail (except for #8). They are pass/null tests. Ability implies potential. Lack of ability does not imply lack of potential. (Except nominally in the Bayesian sense.)
The levels are about potential, not ability. The tests are not pass/fail (except for #8). They are pass/null tests. Ability implies potential. Lack of ability does not imply lack of potential. (Except nominally in the Bayesian sense.)