'Useful' in the Bible

Can wood be taken from it to make anything useful? Or can anyone make a peg from it to hang things on?

No! It is thrown in the fire for fuel; when the fire has burned up both ends of it and it is charred in the middle, will it be useful for anything?

Indeed! If it was not made into anything useful when it was whole, how much less can it be made into anything when the fire has burned it up and it is charred?