What is Ebert's Law?
1.
When you ask somebody to try their own hand at something before criticizing your efforts, you have violated Ebert's Law and lost the argument. Roger Ebert is not a filmmaker, but he knows what he likes and doesn't, and has every right to say so. Similarly, people don't need to be chefs to recognize a good restaurant, or musicians to appreciate a symphony.
Person 1: Your story is rubbish!
Person 2: I bet you couldn't do better!
Person 2 has violated Ebert's Law