Q: how many medieval historians did it take to screw in a lightbulb?
Medieval-era historians: 8,000! No, 10,000!
Modern-era historians: (actually it was 3)

Q: how many medieval historians did it take to screw in a lightbulb?
Medieval-era historians: 8,000! No, 10,000!
Modern-era historians: (actually it was 3)