like we are supposed to just assume the deaf person is mute as well? and hygor, it's not dumb, it's deaf and mute, I think that's the more PC (politically correct) way to say it without offending anyone. because technically, they aren't dumb, they just don't have the function/ability to talk/hear like we do. unless of course, in the UK they still use those old sayings and phrases from way back when because it was alright to say "dumb" in the US a long time ago.
my two cents, LOL.