Suppose How to make a classic French omelette<br>Crack eggs into a bowl and beat until the yolks and whites are well combined. Heat a non-stick skillet over medium heat and add butter. Pour the eggs into the skillet and stir with a fork, allowing the eggs to set slightly. Add fillings such as cheese or herbs if desired.
Can we infer that "A classic French omelette must contain cheese or herbs."? Yes, no, or maybe?