Take the following as truth: In the grand old lighthouse (and second prison), the Tour de la Lanterne, you will find prisoners' graffiti on the walls as you climb up to the balcony for a view over the city and the bay.
Then the following statement: "Some of the historic graffiti in the Tour de la Lanterne have been removed or censored." is true, false, or inconclusive?
Answer: Inconclusive