56

Logic IV. 64
and its congenes are often quite wrongly understand to refer to quantity alone. Lutoslawski in this place does us the service of informing us that we know in our times after many difficult measurements that no grain of sand is equal to another nor a drop of water to another drop. But Plato had no microscopes and micrometers at his disposal and it was a deep insight into the nature of physical phenomena that allowed him such as audacious generalization against the evidence of his senses. A singular generalization indeed that should conflict with the evidence! But all this is poppy-cock. There havea been no measurements proving that no two things are equal. It is however a service that Mr. Lutsoslawski has done us in making the remark since he has offered a convenient illustration of the violation of several logical principles which will be noticed in its proper places. We pass to a supplementary argument of Plato. He says that if we knew that perfect resemblance there is