Are dogs really loyal?

The so-called loyalty is only aimed at the attachment of some dogs to their owners ~ ~ The dog's IQ is no smarter than that of a 6-year-old child ~ ~ How can it know what loyalty and disloyalty are ~ ~ It's just its nature ~ ~ After training, it can understand simple commands, but in fact, it just establishes a conditioned reflex ~ ~ It doesn't really understand people's words ~ ~ And it's only aimed at some dogs with high intelligence and obedience ~ ~