Since, now, in respect of the formal rules of judging, apart from all matter (whether sensation or concept), judgement can only be directed to the subjective conditions of its employment in general (which is not restricted to the particular mode of the senses nor to a particular concept of the understanding) and so can only be directed to that subjective factor which we may presuppose in all human beings (as requisite for a possible experience generally), it follows that the accordance of a representation with these conditions of the judgement must admit of being assumed valid a priori for everyone.