You're over-stretching the metaphor at that point. "Black and white" can just as easily be "blue and red" thinking. Any binary choice works. "Gray" is just sup

You're over-stretching the metaphor at that point. "Black and white" can just as easily be "blue and red" thinking. Any binary choice works. "Gray" is just supposed to represent seeing things in a more analog fashion. You could replace it with "purple". The problem arises when all you do is point out the gradients rather than make a decision based on the information given. So the idea isn't to "introduce more colors" but to finally make a decision. "Yes, this is grey. But it's a really, really, really dark grey. It's mostly black with a tiny bit of white." A good live example is gambling. You're often forced to make decisions based on incomplete information where every decision has some upside and some downside. You can't sit there hemming and hawing.