Yes. Maybe not 100% maybe not for everyone, but you can sure pass for someone without a stammer. There are 3 causes, physical the breath and diaphragm control, the brain stuff - how you are wired up and the psychological - the baggage you have from the stress of not being able to get your words out. Try an elastic band around the chest, gym band sort of thing to aid with breathing. Try singing the words, its a different part of your brain than used for straight speech. Sing your answers with good friends and family and over time wind down the performance part of that vocal presentation. For the psych part, and everyone is different, I found making it funny helped. I focused on the humour, learnt to enjoy stuttering and how awkward it made other people feel rather than my feelings. I know this sounds insane, but try to upset people with your stuttering, feed off it, maybe even go out of your way to pretend to stutter when you are having a good day vocally. Eventually it won't matter if you stutter and when that happens you'll stop. At least that's how it was for me. I still drop and repeat the occasional word, but I could barely start a word from the age of 5 until I was in my mid teens.