We are renewable and recycled.

You could say that being replaceable is not a good state to be in for a human being.

None of us are replaceable.

Some of our work, our remits to do some tasks and take some large responsibilities are replaceable in as much as someone else could be appointed to do these on our behalf.

But is your great friend replaceable?

No?

Why not?

And there, you have some answers to important questions.

Best now, to ask some more!