Imagine a time traveller who loves Beethoven, and so travels back in time to meet his hero.
When he’s there, he discovers that the composer has written and will never write any of the music attributed to him.
In desperation, the time traveller decides to copy out all of his favourite tunes for Beethoven.
The plan is successful, and Beethoven’s place in history is secure.
Then, several centuries later, the time traveller listens to Beethoven and decides to meet him.
The question is this one:
who really wrote Beethoven’s Fifth Symphony?
