Aristotle said that nature avoids the infinite, because the infinite lacks purposeful completion, but that is just what nature seeks. McLuhan restates the same thing, in a quote from the inventor of the laser Dennis Gabor :
Exponential curves grow to infinity only in mathematics. In the physical world they either turn around and saturate, or they break down catastrophically.Change cannot be interpreted merely in quantitative terms. If a process is accelerated, in the real world there will come a point where one form will change into another. McLuhan's reception of Gabor's remark seems to echo the element of the tetrad called reversal or flipping: if a process is pushed to its limits it will flip or reverse into its opposite or complement.