Essentially unique

Okay, let me try to explain "essentially unique" like you're five years old.

So, you know how people have different names, right? Well, just like that, things that are "essentially unique" means that they are very special and different from everything else. It's like each thing has its own special name that only it can have.

For example, think about snowflakes. Everyone knows that no two snowflakes are exactly the same, right? That's because each snowflake has its own special pattern that's different from all the others. So we can say that each snowflake is "essentially unique" because it's really special and different from all the other snowflakes.

Does that make sense? Essentially unique just means something is very special and different from everything else.