 We know a priori something very general about the form of universal experience, of course: it will be spatiotemporal and the principles of experience (applications of the categories) will hold in it. But that does not determine the determinate a posteriori content of universal experience, and the idea of a qualified phenomenalist analysis of empirical objects is to hold that their existence and empirical properties are (partly and wholly, respectively) grounded in that fully determinate a posteriori content. So we might begin with the following analysis: