There's only one true example I can give without going off the idea and this example is quite "techy", so I'm sorry for those who possibly won't understand the principle. I'm certainly not being ignorant, I just cannot think of any other as good example as this one.
There's a virtualization program called Virtual Box, which creates a virtual, emulated environment in which you can run another operating system inside your main operating system. The whole environment is completely emulated, therefore the system inside it (called the guest system) has no access to your main system and cannot alter it. Thus, this guest system cannot operate any faster than the main system, cannot outperform it in any way. What is this called? When a sub-category item (child) cannot "understand/outperform" its group parent?