Phonological constraints can, in principle, be classified according to whether they are natural (founded in principles of universal grammar (UG)) or unnatural (arbitrary, learned inductively from the language data). Recent work has used this distinction as the basis for arguments about the role of UG in learning. Some languages have phonological…

Experimentally manipulated differences in mental state can systematically alter the linguistic intuitions which speakers render about acceptability of sentences. The processes underlying intuitions must be taken into consideration when they are used as empirical data to test grammatical theories. A theory of introspection must be part of the…