This question asks about how we can possibly know that our mesorah (tradition) is correct since we lost the chain of smicha. But what is so important about a chain of blankets? Such things are useful for prison-breaks, but how do they help us maintain our tradition? Perhaps something useful was written on them?
From the question, I gather that Moshe had a blanket to which Yehoshua attached his own blanket and that this continued throughout the generations. If this continued through generations until the times of the gemara as that question suggests, that must have been quite a large chain of blankets! How could it possibly have been lost?!