  While Szilard gave a specific example of a measurement process that was supposed to demonstrate the entropic cost, he did not attempt a general argument that no physical measurement process could do better. Instead the argument went that if one did exist, it would lead to an untamed demon. In light of later arguments, it should also be pointed out that it is not, in fact, measurement but the erasure of the measurement outcome that generates the entropy production in Szilard's example.