ABSTRACT
The thesis against which Paolo Bozzi builds his argument is that “no-one ascertains another’s ascertaining”, which means that each of us is put in the position of a Descartes or a Leibniz as a unextended and hence incorporeal point or monad, which surveys the world from its own irreducible perspective. Underlying the assumption, there is a radical separation between mind and body, with which Bozzi took issue from the outset, insisting on interobservation and the ban on conducting experiments with a static observer. Bozzi taught us this when he observed that his cat worked with the tunnel effect. If he threw a ball behind the settee, the cat was ready looking for it on the other side. This was enough to show that, for all the differences in perceptual apparatus and conceptual schemes the cat not only was able to interact with Paolo, but was looking for regularities in the world.
