Expensive commercial courses have long been promoted to teach people to walk barefoot on hot coals through a technique called "neurolinguistic programming." Physicist Bernard Leikind was able to show that anyone with reasonably callused feet can walk over a bed of coals because he

Question

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Bernard Leikind demonstrated that walking on hot coals did not require special training by showing that volunteers could do it without any prior instruction, challenging the necessity of expensive courses.

Expensive Commercial Courses Have Long Been Promoted to Teach People