A more thorough explanation:

Definition: Operability refers to the ability of an invention to work as described. When a patent examiner reviews an invention, they may challenge its operability and require proof, such as a demonstration of a working model.

Example: Let's say someone invents a new type of engine that they claim is more efficient than any other engine on the market. In order to obtain a patent for their invention, they must demonstrate that the engine actually works as described. This means they need to provide evidence that the engine can actually run and produce the claimed results.

Another example: A scientist invents a new type of medication that they claim can cure a certain disease. In order to obtain a patent for their invention, they must demonstrate that the medication actually works as described. This means they need to provide evidence that the medication can actually cure the disease in question.

These examples illustrate how operability is an important factor in obtaining a patent. In order to protect their invention, inventors must be able to demonstrate that it actually works as described. This helps to ensure that patents are only granted for inventions that are truly innovative and useful.