If from any proposition having more than one subject (used to include “objects”) we strike out the indices of the subjects, as in “– praises – to –,” “– dat in matrimonium –,” what remains and requires at least two insertions of subject-nouns to make a proposition is a “relative term,” or “relative rhema,” called briefly a “relative.” The relative may be converted into a complete assertion by filling up the blanks with proper names or abstract nouns; this serves as a criterion.