The amount of keyframes in animation is not even close to 24 and everything inbetween are called "tweens" for obvious reasons. From my understanding the tweens

The amount of keyframes in animation is not even close to 24 and everything inbetween are called "tweens" for obvious reasons. From my understanding the tweens are actually drawn as well, but can be delegated to non-lead artists thus don't require as much artistic decision making. You get the key frames and then draw what you believe would be the transition. I suspect with modern digital animation you could do a lot of the tweening automatically on the computer, but even then you would be carefully selecting them and fine tuning it to match your vision. Then at the end you would actually have 24 frames per second to turn into your final video. You shouldn't have any frames where something is mid-movement and blurred between the two positions.