 Bolzano’s term is ‘Vorstellung’. This was the standard rendering of ‘idea’ in German translations of Locke, Hume, et al. It is also sometimes rendered as ‘presentation’ or ‘representation’, e.g., in translations of the works of Kant and Husserl. Bolzano’s decision to continue to use the term tends to obscure the vast differences between his views and those he found in the logical literature of his time. Ideas, for him, are akin to Husserl’s part-meanings or to Fregean senses other than thoughts. This is not at all what most of the authors Bolzano discussed meant when they spoke of ideas, even if there was a tiny point of contact in the circumstance that, like him, those authors usually maintained that ideas (or notions, concepts, cognitions) could occur as parts of judgments, namely, as their subjects and predicates.