1. The user states "they aren't DNE," which means "they do not do not exist." This typically refers to limits, functions, or values that exist and are defined. 2. To clarify, DNE means "Does Not Exist," so if something "is not DNE," it means it exists or is defined. 3. If you have a specific function, limit, or expression in question, please provide it so I can help determine its existence or value. 4. Without a specific problem, the general rule is: if a limit or function value is finite and well-defined, it does not DNE. 5. For example, the limit $$\lim_{x \to a} f(x)$$ exists if the left-hand and right-hand limits are equal and finite. 6. If you want me to check a particular problem or expression, please share it.