If you want to talk about kidney stones (etc), fine, but throwing this "zomg no diet soda or you won't lose weight" stuff around is dumb.
I know that other guy did, but I never said nor believe that it has anything strictly to do with weight loss. I was simply challenging your assertion that "soda has the acidity of a tomato" so therefor it's "fine" or whatever with no volume considerations. People routinely drink 60 oz diets and I used to drink multiple a day. I have no clue how many tomatoes that would be but I would bet it's another irrational number.
Dr. Oz clip, pretty bad.