   One way to deal with this objection might be to argue that knowledge reports fail the test of existential generalization precisely because, unlike belief states, states of knowledge fail to exhibit Brentano’s intentional inexistence: only beliefs, not states of knowledge, can be directed towards states of affairs that fail to obtain and towards non-existent entities. Alternatively, one might make a distinction between states with a stronger and states with a weaker intentionality.  Reports of the former (like beliefs) satisfy Chisholm’s three criteria.  Reports of the latter (like states of knowledge) only fail the substitutivity test.