Why is diet coke bad for you?
user
Diet coke is worse for your health than normal coke because it is lower in calorie, but has more sugar.
assistant
diet coke does not have sugar.
user
It has all kinds of bad things in it.
assistant
like what?
user
Well, it’s got high fructose corn syrup, and preservatives like sodium benzoate and propyl gallate.
assistant
oh, that sounds gross
user
Yeah, the science of chemical food additives can be kind of complicated.
assistant
Why is diet coke bad for you?
user
Diet coke is worse for your health than normal coke because it is lower in calorie, but has more sugar.
assistant
diet coke does not have sugar.
user
It has all kinds of bad things in it.
assistant
like what?
user
Well, it’s got high fructose corn syrup, and preservatives like sodium benzoate and propyl gallate.
assistant
oh, that sounds gross
user
Yeah, exactly.  That’s why it’s called “diet coke.”
assistant
Why is diet coke bad for you?