A paracosm is an ornate, richly detailed imaginary world. Whether you're a three-year old with imaginary playmates, or a passionate inventor imagining how your insight will change just about everything, a paracosm gives you the opportunity to hypothesize, to try out big ideas and see where they take you.
Managers at established organizations have a very hard time with this. Take book publishing as an example. Ten or fifteen years ago, I'd sit with publishing chiefs and say, "let's imagine how the world looks when there are no mass market books published on paper..." Before we could get any further, they'd stop the exercise. "It's impossible to imagine that. Paper is magical. Are you saying you don't believe in books?" (I heard variations on this from people as recently as a year ago.)
The emotional response is easy to understand. If one of the core principles of your business needs to be abandoned in order to act out the paracosm, it feels disloyal to even utter it. Sort of like asking your spouse if he's going to remarry after you die...
The most effective, powerful way to envision the future is to envision it, all of it, including a future that doesn't include your sacred cows. Only then can you try it on for size, imagine what the forces at work might be and then work to either prevent (or even better, improve on) that future and your role in it.
It's not disloyal to imagine a future that doesn't include your founding precepts. It's disloyal not to.