There exists an internal world within humans. This can be shown by Jackendoff's First Fundamental Argument which states that each human is born with mental grammar. This is linked to the fundamental argument stated in class known as "internalism". He states that the user's brain is capable of express in different languages. This is due to the mental grammar residing in the human's brain.
Within the human's brain, there lies unconsciously grammar rules which assists us in comprehending and interpreting the language. This is exclusively to humans. Bottlenose dolphins despite their bigger brains cannot use the language with as much "expressive variety". The human's mental grammar allows the generation of new phrases with the usage of words stored
