OK, I don't even know what to say. The largest study ever done on the topic shows that there is no link (it even showed that there may be a small protective effect), and you don't "believe" it. It's a major study from a well-respected university; it's pretty audacious of you to simply dismiss it out of hand. With regard to the "stupid" question. Anecdotal evidence doesn't prove anything. If I find someone who says they feel stupid after drinking water, have I just shown the powerful psychological impact of water? I don't doubt that one could cough until they hit a gag reflex, but that's not the same as passing out and asphyxiating on vomit. on the understanding why it's nonsense.