The trend, popularized by TikToker @mckennaelianna shared her ‘Girl Math’ logic that she "firmly believes in" and garnered 2.2 million likes with over 13,000 comments.

The creative logic, known as “Girl Math,” to justify discretionary spending has gone viral. Wall Street Journal reporter Chavie Lieber joins host J.R. Whalen to discuss the social media trend.

Originally published on Sept. 25, 2018. In a world of divisive politics, rhetoric and debate, author Eugenia Cheng has the secret to winning an argument: mathematical logic. Cheng, a mathematician ...