Why Does Zero Factorial (0!) Equal One?

Photo by Scott Rodgerson on Unsplash

Recently while in a circle of friends and sipping on a glass of tea, the topic of conversation came around to what humanity’s most remarkable discovery was. Someone put forward the notion that it was the internet, and many others readily agreed with this claim. As the conversation on the matter expanded further, I had gotten stuck on the phrase “humanity’s greatest discovery” and wholly disengaged from the ongoing…