Linguistics is a branch of psychology. It follows that the mind is predisposed toward certain kinds of knowledge. The mind itself is the object of study, and language is a kind of evidence about part of the mind. Two fundamental questions within the Chomskian paradigm. There is a tension between descriptive richness required for a descriptive adequacy and the restrictiveness required for explanatory adequacy.
Data underdetermines the grammar.
Setting parameters The lexicon 3. Some properties of the grammar. The architecture of the grammar. No rules, just constraints. Movement can be overt or covert.