Another word for authentic is believable. Meaning the consumer can believe what the brand is communicating about itself, its products and its culture. Apple appears authentic because they demonstrate how their products simplify life and make it more enjoyable. Honda expresses reliability and fun, and their products are certainly known for reliability. Look at struggling brands, like Sears, who tried to be all things to all people, from Craftsmen tools to Lands End. It was too broad and general, and the market validated it with declining sales.