“The process of forming a concept is not complete until its constituent units have been integrated into a single mental unit by means of a specific word.” This assertion reflects Rand's bias against tacit knowledge. Rand was always mistrustful of anything that smacked of "just knowing." She shared the rationalist's contempt for non-explicated knowledge. The problem with this attitude is that does not square with what is known as the "cognitive unconscious," which plays a much larger role in cognition than Rand could have ever imagined. Hence the pressing need for Objectivists to come up with a large body of compelling, scientifically validated evidence to back Rand's extraordinary assertion about the necessity of words for the "completion" of a concept. The fact is, there are far more meanings (i.e., concepts) than there are words to stand for them. To declare that these unworded meanings are incomplete is sheer prejudice. Indeed, Rand herself seems to have thought better of it; for her notion of "implicit concept" contradicts her view that concepts require explicit words.
“The battle of human history is fought and determined by those who are predominantly consistent, those who … are committed to and motivated by their chosen psycho-epistemology and its corollary view of existence.” Leonard Peikoff, Rand's most orthodox disciple, has attempted to provide evidence for this view in his book Ominous Parallels. Unfortunately, that book cannot be taken very seriously. It suffers from an extreme case of confirmation bias. It has eyes for only that evidence which supports Rand's view, while ignoring the large body of evidence that goes against it. Worse, it even distorts and mauls such evidence that is brought forth to support the Objectivist position.
Consider, as one example, Peikoff's treatment of Kant, who is regarded, by both Rand and Peikoff, as a "predominantly consistent" advocate of all that they deplore. This, however, is not a very compelling position, for a whole host of reasons. In the first place, hardly anyone outside of Objectivism regards Rand's view of Kant as fair or accurate. But even if it were, questions arise over Kant's supposed consistency. Kant, for example, believed in the ideality of time, space, and causality; which means, if he had been "predominantly consistent", he would have been forced to regard all multiple and successive experiences as purely mental and imaginary. Nonetheless, Kant had no difficulty squaring these bizarre speculative allegiances with his work on astronomy and in his comforting postulates about immortality. Kant was also one of the principle figures of the so-called "Enlightenment," and gave voice to many things esteemed by Rand and her disciples. This aspect of Kant, while acknowledged by Peikoff, is dismissed as "inessential" and inconsequential. Why so? Even on Objectivist assumptions, Kant's advocacy of Enlightenment ideals must be regarded as a deep and abiding inconsistency.
“Only three brief periods of history were culturally dominated by a philosophy of reason: ancient Greece, the Renaissance, the nineteenth century.” This statement is so vague it's not clear its empirically testable. But to the extent that any meaning can be drawn from it, it is largely false. If by "reason" we mean something logical, we find the same examples of illogic and non-logic governing all periods of history. The human being is not a logical animal, but a sentimental animal. Ancient Greece, for example, was still rife with superstition; and Plato, Socrates, and even Aristotle, despite all their fine words about "reason," were hardly shining exemplars of scientific thinking. The Renaissance was the age of Luther and Savronola; it featured a revival of interest in the mysticism of Plato. The 19th Century, on the other hand, was "philosophically" dominated, in Germany, England, and America, by the horrors of neo-Hegelianism (although this so-called domination played hardly any influence outside of academia).
The assault on man’s conceptual faculty has been accelerating since Kant, widening the breach between man’s mind and reality. Given the immense progress made in science and medicine made since the 18th century, this is a grossly implausible view. In the 18th century, doctors bled people. Men rode around on horses. Plows were drawn by ox or mules. The majority of people in the West believed in the literal truth of Genesis. Anti-semitism and various forms of racism were rife. Blacks were bought in Africa and sold to colonists in the New World. It's not clear, given everything that has been learned in the interval, how anyone with even a rudimentary of history can believe that the breach between man's mind and reality has been "widening" since the 18th century.