brain chooses the correct word

The average 20 year old knows between 27,000 and 52,000 different words.By age 60, that number averages between 35,000 and 56,000.Spoken out loud, most of these words last less than a second.So with every word, the brain has a quick decision to make:which of those thousands of options matches the signal?About 98% of the time, the brain chooses the correct word.But how?