In theory, words should make it possible to discuss anything, but sometimes, without the right setup and context, it can be hard to understand someone (especially if there are additional barriers to communication like not being a native speaker of the language or being very young). I recently had to "translate" the following statement by my three-year-old for his grandfather. This was said at dinner with no other context. 

"Papa Jim, Anthony tricked me that you were a dragon. But you are not a dragon and you will never be a dragon."