> I don't think that's true.

How long did you have to think to produce that thought? Or did it just pop into your head instantly?

The point is, you cannot think of an upcoming thought, before you have it in your head. Otherwise you would be seeing into the future.

What you are talking about in your comment is reaching a conclusion based on previous thoughts. Yes, often we link our thoughts together into a narrative or a conclusion after we've had the thoughts, but the thoughts themselves? Those seem to come out of nowhere.