When Language Fails

Abstract

The theory predicts complete lexicalization when the number of exceptions to a rule exceeds the threshold, which leads to morphological gaps: without a productive rule, you only know the derived form if you hear it otherwise ineffability arises. Detailed numerical studies for gaps in Russian, English, Spanish, and Polish. The Tolerance Principle also directly bears on language variation and change, in that it provides/predicts the conditions under which language change is actuated. As a case study, the theory explains why—and when—the so-called dative sickness, and other instances of case substitution, took place in Icelandic in the 19th centuries.