"The value of an idea lies in the using of it."
- Thomas A. Edision
"Logic is the beginning of wisdom...not the end."
- Leonard Nimoy (as Spock)
None. Well, one: You do need to be over 18 years of age, reside in the U.S., and have a pulse. But that's about it. There is no qualifying, physical exam, IQ test, beauty contest, or credit check!