Answer:
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
What is deaf, dumb, and blind, but always tells the truth?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
I can wake you up in the morning but I require no electricity or winding.
The answer I give is yes, but what I mean is no. What was the question?