Have you ever asked someone to repeat themselves, only to realize that you suddenly know what they said? Read something without realizing a word was repeated or misspelled? Heard words in an instrumental song?
3 Ways You Hear & Read Missing Words
Speaking Fluent Gibberish
Studies of brain trauma to the so-called “language center” teach us about areas of the brain controlling two very different aspects of speech.
The Layman's Linguist 