It actually used real data to test his theories.

FORBES: The Fallacy of 'The Seven Habits of Spectacularly Unsuccessful Executives'

Fortunately, we have enough real-world tornado data to test how well the competing predictions match up with reality.

FORBES: Alarmists Offer A Perfect Global Warming Challenge

Data mining Twitter was their real world test (as opposed to something a little bit more rigorous which would take a little longer).

FORBES: Can Twitter Tell Us If Apple's iPad Won The Christmas Tablet War?