Consider a talented actress. One who delivers dialog with a polished and appropriate accent in full character and maintains a relative consistency of that character throughout her performance. But, unfortunately this actress cannot remember the script and struggles all show with missed cues and botched lines. On the other hand, another actress may not have the full grasp of her character but knows the script so completely that the show flows, and her performance is void of any forgotten lines. The average audience member would probably deem the second performance more complete and enjoyable than the first.