 However, if constraints are placed on the probability ranges which concepts may represent, then a stronger language is obtained.For example, we might permit only concepts wherein at least one probability differs from 0.5 by more than formula_15.Under this constraint, with formula_16, a concept such as codice_8 could not be constructed by the learner; however a concept such as codice_9 would be accessible because at least one probability differs from 0.5 by more than formula_15.