[quote name='SneakyPenguin']Ok, I'm not trying to be offensive or anything here, but I thought of this in the shower, and is really making me wonder.
Can a person, deaf since birth, laugh? Will they just mimic the motion, or is the sound to be made ingrainied before birth? Or does it have to be picked up, therefore meaning they cannot do it.[/quote]
I've actually thought about that before and several other similar thing which is the sort of scary part. But I think that the sound needs to be picked up because if you cannot hear, you cannot hear. And if they cannot hear, what can they laugh about? Hmm.
EDIT: Actually if someone were to do something funny and all they'd need to do was see it, then I suppose it could be possible. I'd guess if anything that a laugh is like an instinctive reflex, so it might not sound exactly like a laugh but they would still produce something close to it if they were to find something funny.