No, but the best anecdotes are at least based in truth. Anecdotes (funny stories) are often based in exaggerations, conflations (when you combine two different events) and pure fiction.
No. See the related link below for info on the original 1969 movie.
Fiction means not true, it means made up,fake.
Fiction is made up, a story that is not true.
No, it is not.
The definition of "true" is that it actually happened.