[Ellendra]

There is a principle in physics, called the Principle of Self-Consistency. This principle states that if you could go back in time (by whatever method), you would not be able to change anything.

How many times has this principle been tested?

[Leaning Right]

How many times has this principle been tested?

Zero! That's why it's a respected Principle, but not a Law. It's something that makes sense, and is interesting to discuss, but as of now it carries little scientific weight. Here's a good layman's read on the Principle:

Principle of Self-Consistency