Three days before, I'd blithely admitted that my solution to reading a book too advanced for my 5-year-old son was to edit the story on the fly. Without missing a beat, I downgraded Voldemort's intention to kill Harry to the less-nightmare-inducing hurt. Yes, the book I was revising was Harry Potter and the Sorcerer's Stone.
When readers are distracted by illogic, they're not invested in your narrative; no matter how good the rest of your story may be, it's simply not going to hit readers the same way. Run a switchblade through a small part of the Mona Lisa and no one notices the masterpiece. All they see is the scratch.