If you have a stutter, why are you trying so hard to convince others you don’t? What good is it going to do living a lie and making it harder for yourself? Most of those people won’t care you stutter and probably respect you for getting up there and presenting. I have to do presentations every other week in my job - so what if I stutter? I can’t help it and it’s only a small part of me compared to what I’m actually saying in the presentation itself.