Project 5 router 2 inputs with the same address

Logisim Projects
1

hi
can we assume that every address in the table is unique?
meaning is it possible that the same address will be inserted more then once to the table?

2

If an address appears twice then it does not implement a function.
Hence, addresses are not repeated in the table.

3

Does that mean that the same address would not be entered twice? or that we need to check if the address already exists before saving it?

4

You can assume that duplicate addresses won’t be input.