> The post I replied to doesn't mention supply either directly or indirectly The post you replied to doesn't mention demand either. It only talks about price.

> The post I replied to doesn't mention supply either directly or indirectly The post you replied to doesn't mention demand either. It only talks about price. There is a difference between demand and price, and there is no generic function from price to demand. Even such basic assumptions as "demand falls as price goes up" fail in some situations.