Differences can occur with all things based on the view that you are looking? If you look at a bird is a bird it is brothers and brothers, but if you look at the different birds. Two birds that might be is unknown.
Differences can occur at all. Based on the view that you will look like. If you look at the birds are brothers. Birds are brothers If you see different birds. Two birds that may not be known yet.
The differences can occur with everything. Based on the view that how you look at it. If you see the bird brothers, birds are brothers, but if you see the birds are different. Two birds that may not know each other.