Wether or not a trait is mutable is different from the degree to which that trait is mutable. The distinction is important. Most breeds of dog can be trained to

Wether or not a trait is mutable is different from the degree to which that trait is mutable. The distinction is important. Most breeds of dog can be trained to learn some simple commands, but good luck getting some mutt from the pound to herd sheep like a border collie. Here's a video of border collies in action: https://www.youtube.com/watch?v=bpjP3mxv21s https://www.youtube.com/watch?v=bpjP3mxv21s