 In other words, for Spinoza both (confused and inadequate) imagination and (necessarily adequate) reason are ways of forming general ideas; what distinguishes reason and imagination is in part the epistemic value of their respective “universal notions”. The general ideas that belong to imagination are, as we have seen, confused and inadequate and can lead us into error (3.2.2). The general ideas that belong to reason – in particular, common notions and their derivatives – are, like all ideas of reason, necessarily adequate (3.2.3). The question that remains is whether Spinoza recognizes any other rational and general “adequate ideas of properties” beyond those implied by common notions.