The human brain works as a binary computer and can only analyze the exact information-based zeros and ones (or black and white). Our heart is more like a chemical computer that uses fuzzy logic to analyze information that can't be easily defined in zeros and ones.
Nostalgia is something we think of as fuzzy. But it's pain. Pain concerning the past.
My feeling is, when you are writing an essay, you don't make anything up. This may be a very Protestant notion, and I'm aware of the fact that memory is fallible, that if I had access to films or some absolute documentary evidence of what happened, it might look different; we get confused and fuzzy.
People assume that science is a very cold sort of profession, whereas writing novels is a warm and fuzzy intuitive thing. But in fact, they are not at all different.
Unfortunately, I'm an engineer. I'm always thinking about, what's the task and how do I get it done? And some of my tasks are pretty broad, and pretty fuzzy, and pretty funky, but that's the way I think.