The key to writing memoir — a form of creative nonfiction — is honesty. Readers of the memoir genre demand authenticity. They want the raw, unvarnished truth. Otherwise, they would just read fiction, right? As writer Steve Almond signed in his book, This Won’t Take But a Minute, Honey, to a struggling creative nonfiction writer in 2012: “Jennifer, run toward the darkness and shine.” Yeah, that was me, absorbing the concept of radical disclosure. I had no idea what that meant back then. But a dozen years later, I’m much more open to it. Here goes nothing, my dear demanders of brutal honesty: For some unknown reason, since my partial knee replacement surgery, whenever I…