 Although in many cases ideas are assumed to be structured like linguistic expressions, it is also clear that Bolzano recognized ideas whose structure cannot be captured in a linear script. For example, in ideas of the form ‘\(A\), which has the properties \(b, b', b'',\ldots\)’, no ordering is supposed between the parts \(b, b', b'',\ldots\), which occur in the idea in itself as a unordered collection (Menge).