Take the following as truth: They were built at the very beginning of the 16th century by Sultan al-Ghuri, the last Mameluke ruler, and his mausoleum at the heart of the development is now a cultural center hosting regular performances of the Whirling Dervishes (who achieve religious ecstasy by circling around in continuous motion).
Then the following statement: "Sultan al-Ghuri ruled for 75 years." is true, false, or inconclusive?
Answer: Inconclusive