e said that mathematical
| reasoning (which is the only deductive reasoning, if not absolutely,
| at least eminently) almost entirely turns on the consideration of
| abstractions as if they were objects.  The protest of nominalism
| against such hypostatisation, although, if it knew how to formulate
| itself, it would be justified as against much of the empty disputation
| of the medieval Dunces, yet, as it was and is formulated, is simply a
| protest against the only kind of thinking that has ever advanced