Chomsky's 4 main arguments for the necessity of Universal Grammar.

1. The irrelevance of intelligence in language learning.

2. Simultaneous multilinguals and the problem of multiple settings on a single parameter.

3. child learns two different languages wuthiut any special difficulty and is fluent bilingual

4. language learning is essentially independent of intelligence

5. Objection: "the more intelligent the person, the better the grammar would be

6. Denegrate, meagre and minute language input.

7. Ease and speed of child language acquisition

8. Chomsky: "in large measures of sentences that deviate iin the form of idealized structures defined by the grammar that the child develops.

9. Objection: "The child takes in what it can understand and simply discards what it cannot process

10. Chomsky: " A child is able to gain perfect mastery of the language with incomparably greater ease and without any explicit instruction

11. Objection: The relativety long time inmplies. There is plenty of time for a child to learn a language.