 In current terminology, the semantics of the Ramsey sentence is the following: \({TC}^R\) is true in a structure \(S\) for the primary terms if and only if it is possible to add interpretations for the secondary terms to \(S\) such that \(TC\) is true (Przełęcki 1969, ch. 6; Andreas 2017, §4.2). Sneed (1971, 106) modified the semantics of the Ramsey sentence for the use in structuralism (Schmidt 2014, §2.2.1; Stegmüller 1976, 88–89). Maxwell (1970, 186–88) identified the Ramsey sentence with its semantics to argue that the Ramsey sentence expresses structural realism (see also Ladyman 2016, §3.2).