Einstein also began with a critique of Newtonian dynamics to prove that the conclusions we can draw from electrodynamics are as limited and as relative as those from mechanics. From this denial of our ability to obtain real or absolute knowledge he, like Berkeley, has proceeded to construct a positive philosophy of the absolute. Relativity, as it has now been interpreted by such disciples as Whitehead and Eddington, is merely idealism under a new guise. The objective world of sensation and experience is illusion, and truth exists only in a set of subjective mathematical formulæ of cosmic _events_. The relativists openly rejoice that mathematics has come into its own kingdom and is no longer to be the handmaiden of physics, no longer to be restricted by the limitations of the sense-perceptions. Euclidean geometry, which is limited to the three dimensions of tactual space, has been replaced by a geometry of hyper-space, the properties of which no one can be cognisant of. Subjective time is eliminated, and objective time is conflated with space. They, too, deny the validity of the senses, as did the mediæval schoolman, and picture a topsy-turvy world. They are labouring under the delusion that the limitations of logic can be avoided by the simple substitution of mathematical symbols for words, forgetting that mathematical symbols are as meaningless as words when they are detached from facts. They fail to see that the equation is but a form of the syllogism. One can trace all through their argument the old and familiar fallacy of the ambiguous middle. They are quite reckless, as it suits their convenience, in confusing physical space of three dimensions with mathematical space of an unlimited number; neither do they distinguish time as a subjective sequence of events from time as a measurable component of velocity. The relativists are as rash as those sociologists who see a real connection between physical energy of motion and mental energy of thought and so deceive themselves with the notion that they are scientific.