1‘training is a prerequisite for competence’
necessary condition, precondition, condition, essential, requirement, requisite, necessity, proviso, qualification, imperative, basic, rudiment, obligation, duty
sine qua non
1‘the student must have the prerequisite knowledge’
necessary, needed, required, called for, essential, requisite, vital, basic, of the essence, indispensable, imperative, obligatory, mandatory, compulsory
We take a look at several popular, though confusing, punctuation marks.