To speak is to risk being misunderstood.
Please allow me to quote heavily from The Bard Terence McKenna—this selection comes from a discussion about language: We use rapidly modulated small mouth noises. As primates we have incredible ability to make small mouth noises. We can do this for up to six hours at a stretch without tiring. No other thing we can do approaches the level of variation with low energy investment that the small mouth noises do.