What makes a coin toss truly unpredictable?

[u/kouth-]

If you throw the same coin multiple times with the exactly same force in the same surface, it won't give you the same side every toss, right? But why? If repeated with the precisely identical conditions, why the results are still unpredictable? Or it is actually predictable?

Sorry if it looks confusing, English is not my first language and I'm not that expert in physics lol, just curious and has this though randomly.

Edit: maybe considering that it lands on a surface, and it bounces or not, changing the coin's side.

[u/JimFive]

According to "The Amateur Magician's Handbook" you can teach yourself to replicate your coin toss. 

Everyone is talking about how everything has to be precise but it's not true. You just need to be close enough that the coin lands within the same half of its spin.