I have long thought that humans do not have "original thoughts’ as described in the classic sense.
(see what I did there?)
We seek out novel experiences.
That is why we set up experiences to be exposed to new ideas that can be synthesized into “original thoughts.”
For example - we have laboratories where we can be exposed to previously un-experienced observations. We listen to new music. We travel to new places to add to our repository of experiences. We read books and watch movies to experience things vicariously.
Much of what passes for original thought is happy accidents that happen to someone that is constantly working in a given field; some people are very good at paying attention to accidents while practicing and using those as inspiration. You do have to be open to recognizing a happy accident as a useful thing.
That said - we excel at combining prior experiences into novel combinations that are often considered “original.”