The contemporary discipline of biolinguistics is beginning to have the feel of scientific inquiry. Biolinguistics—especially the work of Noam Chomsky—suggests that the design of language may be "perfect": language is an optimal solution to conditions of sound and meaning. What is the scope of this inquiry? Which aspect of nature does this science investigate? What is its relation to the rest of science? What notions of language and mind are under investigation? This book is a study of such foundational questions.