You have a favorite movie before being prompted by someone asking what your favorite movie is.
An LLM does not have a favorite movie until you ask it. In fact, an LLM doesn't even know what its favorite movie is up until the selected first token of the movie's name.
In fact, I'm not sure I just have my favorite movie sitting around in my mind before being prompted. Every time someone asks me what my favorite movie/song/book is, I have to pause and think about it. What _is_ my favorite movie? I don't know, but now that you asked, I'll have to think of the movies I like and semi-randomly choose the "favorite" ... just like LLMs randomly choose the next word. (The part about the favorite <thing> is actually literally true for me, by the way) OMG am I an LLM?
An LLM does not have a favorite movie until you ask it. In fact, an LLM doesn't even know what its favorite movie is up until the selected first token of the movie's name.