His campaign's use of big data to manipulate voters isn't particularly new.
Corrected

Cathy O'Neil is the CEO of ORCAA, an algorithmic auditing company, and the author of "The Shame Machine: Who Profits in the New Age of Humiliation."
Selling the sauce.
Photographer: Bryan Bedder/Getty ImagesDid the magic of psychological analytics -- the big data version of "secret sauce" -- launch Donald Trump into the presidency?
Don't believe the hype.