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Hence, for Frege there is something which is the condition of possibility of language, even though that something —which he calls reason — may not fully function or be applicable without language as its tool. This suggests that for Frege reason is also what enables us to overcome the power of immediate sensual input by using language as a tool; it enables us to memorize links between symbols and what they symbolize even despite the continuous influx of fleeting sensations and memory images. In effect, Frege appears to propose a non-vicious circle between reason and language such that, roughly, the former enables us — by its very nature — to hold in memory a small initial assortment of symbols, and such that the use of these symbols then expands our rational capacities to allow for the combinations and application of those symbols, which in turn are stored in the memory to lead to further combinations — as well as the possible invention of new symbols or symbolic systems — whose use leads to further mental expansion, etc.

This conception seems to rule out that language could be the product of mere sensation, at least if sensation is not to be conceived of as part of reason or as its basis.

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Frege's third explanation for why we need language in order to think is that without the help of symbols we could never raise ourselves to the level of specifically conceptual thinking. For, according to Frege in the passage above, we acquire concepts only by applying the same symbol to different but similar things, thereby no longer symbolizing the individual things, but rather what they have in common: the concept. Again, this argument does not show that concepts could not exist without language or symbols; rather, it shows that concepts could not become available to us without language.

In Frege's own terms, it shows that we could not represent to ourselves what a group of similar things have in common, which is what he calls a concept. Scholars point out that aspects of Frege's explanation of why we need language in order to think suggest an empiricist, psychologist account at least of thought content according to which thought content derives simply from sense impressions via memory images; however, this stands in contrast at least to Frege's later views on the matter for example, Sluga Indeed, Frege's above admission that at the most basic level sense perception and memory are possible without prior possession of non-sensual conceptual elements seems to stand in direct contrast to rationalist as well as Kant ian accounts of the nature of perception.

Though, as we saw in the previous section, none of Frege's arguments for the dependency of thought on language explicitly commit him to the view that the very existence of concepts or thought contents depend on language, the idea that at least basic thoughts and memories are possible on the basis of sensation alone raises the question of why then not all thought and memory content may derive — by means of language — from sensual images which clearly would be an empiricist view.

If this assessment of Frege's view of content is correct, then it might also be relevant to our evaluation of the above argument as an attempt at explaining why language is necessary for thought. For if, by contrast, we assume that the human mind is furnished with innate ideas in addition to the faculty of sensation — as had been the standard view in modern Continental Rationalism — then it might need some more argumentation to show why concepts become available to us only through the application of general symbols to things that we perceive through the senses, or why we could think of invisible, insensible things only by creating symbols for them.

After all, innate ideas — if they exist — are in a certain sense continually present in the mind, if not in our consciousness, and this very presence could perhaps already explain why we are able to memorize perceptual experiences, to engage in conceptual thinking, and in general to overcome the continuous impact of sensation on our attention. In other words, if our minds were already furnished with innate ideas then it would need further explanation to understand why reason could not have a direct impact on human consciousness, that is, why it needs language in addition in order to guide and develop our capacity of thinking.

If we assume, however, that thought contents are by their very nature entirely made up of sensations and images gained through sensation, then it would seem much more obvious that without the acquisition of general symbols to represent concepts — instead of the individual, elusive images delivered by sensation — there would be no way for us to make use of and memorize them. Thus, if Frege held a rationalist view of thought contents at this early point, his argument above for the indispensability of thought for language would still appear somewhat incomplete, and if he was an empiricist about thought content at the time but changed his view later, he should have been expected to supplement his argument at that later time in order to convince us of the necessity to study language in order to explore concepts and thoughts.

So let us take a closer look both at Frege's views of the nature of thought content and at plausible rationalist motivations for the philosophical study of language based on the idea that language is necessary for human thought. Let us first get back to Frege's apparent view — in his piece — that basic forms of sense perception and memory are possible without prior possession of non-sensual thought contents.

This view appears to contradict his own later remarks on perception in, for instance, 's "Thought". There he emphasizes that:. Sense impressions alone do not reveal the external world to us. Perhaps there is a being that has only sense impressions without seeing or touching things Having visual impressions is certainly necessary for seeing things, but not sufficient.

What must still be added is not anything sensible.

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And yet this is just what opens up the external world for us; for without this non-sensible something everyone would remain shut up in his inner world. So perhaps, since the decisive factor lies in the non-sensible, something non-sensible, even without the cooperation of sense impressions, could also lead us out of the inner world and enable us to grasp thoughts f.

For Frege, forming a thought about the external world -- even the kind of thought involved in the mere perception of an object -- requires more than sense impressions that are available to the human mind. In addition, something non-sensible has to be assumed in order to account for the possibility of perception. The aim of "Thought" was to show that this something is the thought itself -- an entity that, as Frege argues here, belongs neither to the inner world of subjective ideas nor to the world of spatio-temporal, perceivable objects, but rather to a third realm of objective but non-physical things.

Indeed, as we read in an earlier passage of the piece, "although the thought does not belong with the contents of the thinker's consciousness, there must be something in his consciousness that is aimed at the thought. But this should not be confused with the thought itself" ibid.

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  4. In this last passage, Frege clearly distinguishes between a conscious act of thinking — which must be in a certain way "aimed at" an abstract, objective thought — and the thought itself at which it is aimed. In addition, Frege explicitly rejects the idea that sense impressions alone could enable our minds to grasp such an objective, non-sensible thought -- rather, what is required is again something "non-sensible. For according to that remark, language — as a means for grasping thoughts — presupposes reason at least as an independent potential. Reason, then, is a likely candidate for the "something non-sensible" that may be required, according to Frege in , "to lead us out of the inner world and enable us to grasp thoughts.

    However, Frege does not make use of the term "reason" in his piece but speaks more concretely of a "special mental capacity, the power of thinking", which is supposed to explain our ability to grasp a thought ibid. In any case, these remarks provide clear evidence that Frege in conceived of thoughts as existing independently of both physical and empirically psychological reality — thereby ruling out an empiricist account of their constitution.

    They do not provide conclusive evidence that Frege endorsed a rationalist or transcendentalist view of the origin or nature of conceptual entities, if by this we understand a view according to which either a special faculty of reason — or pure understanding — or alternatively a certain normative value or principle that is constitutive of rationality in general serve to provide the conceptual content of our thought episodes. Rather, Frege's remarks would just as well be compatible with a naive Platonist view about thought contents, according to which their objective existence is a brute fact, that is, not accountable or explainable in terms of anything else.

    It seems obvious, however, that Frege favored a broadly rationalist or transcendentalist account of the origin of conceptual entities both in his first monograph Conceptual Notation and in his second, The Foundations of Arithmetic Those judgments, by contrast, which "at first glance seem to be possible only on the grounds of some intuition" presumably are those of arithmetic, which Kant had believed to be grounded on the pure intuition of time. This metaphor of pure thought as grounding arithmetical judgments by way of "the content that arises from its own nature" not only appears inconsistent with Frege's seeming slip into psychologism about mental content, but at the same time suggests a rationalist or transcendental approach to the nature of at least some of the contents of our judgments.

    This is so if we conceive of "pure thought" as referring to a capacity or principle that is constitutive of the rational mind, which is how this expression, and similar ones, had been used by Leibniz , Kant , and their successors. In other passages of Foundations , Frege presents objectivity itself as being constituted by reason, and numbers as its nearest kin:. I understand objective to mean what is independent of our sensations, intuition and imagination, and of all construction of mental pictures out of memories of earlier sensations, but not what is independent of the reason, - for what are things independent of the reason?

    On this view of numbers the charm of work on arithmetic and analysis is, it seems to me, easily accounted for. We might say, indeed, almost in the well-known words: The reason's proper study is itself. In arithmetic we are not concerned with objects which we come to know as something alien from without through the medium of the senses, but with objects given directly to our reason and, as its nearest kin, utterly transparent to it.

    And yet, or rather for that very reason, these objects are not subjective fantasies. These latter constitute part of the transcendental as opposed to the subjective, psychological aspect of the mind according to Kant. Scholars who tend to read Frege from the perspective of Neo-Kantianism have therefore taken passages like those above as strong evidence for the thesis that his notion of objectivity was not dogmatically metaphysical but epistemological in the tradition of transcendental philosophy cf.

    Sluga Indeed, as we saw, Frege had initiated this argument with observations about the effect of sense-impressions on our attention. In this he simply followed Leibniz, who — although a rationalist about the origin of thought — had granted that the senses are required to make the mind attentive to truths and to direct it towards some truths rather than others. For this reason, according to Leibniz, even though intellectual ideas and the truths arising from them do not "originate in the senses", without the senses we would never think of them ibid.

    Given such presuppositions about the causal role sensation plays in the generation of actual processes of conscious thought, Frege can still make his case for the necessity of language for thinking by arguing as follows: Without sensible symbols, which — due to their intimate connection to reason perhaps in the form of a set of innate ideas — are able to draw our attention away from other sensory input and toward conceptual thought, our entire mental life would be largely dictated by the nature of our immediate sensations.

    Therefore, we would be psychologically unable to rise to higher forms of conscious awareness and contemplation than those provided by immediate sense perception and the fleeting memory images arising from it. This way of arguing would not commit him to the view that concepts or conceptual thought contents themselves depend for their existence on symbols or on any other sensible images.

    Rather, the dependence of human thought on language could itself be thought of as merely causal Baker and Hacker f.

    As we saw before, Frege apparently sympathized with Leibniz's view that what is innate may need to be learned in order for us to become consciously aware of it. But if we need to learn about truths and concepts that have been in our understanding all along — as Leibniz saw it — then this is compatible with the claim that in order to learn them we need to use language. Indeed, in a much later piece written and submitted for publication shortly before his death "Sources of Knowledge of Mathematics and the Mathematical Natural Sciences" , Frege finally comes to explicitly commit himself to the view that language is necessary not for the existence of thought contents themselves, but only for our conscious awareness of them, that is, for our acts of thinking.

    In this context, he speaks of a "logical source of knowledge" and a "logical disposition" in us that must be at work in the formation of language, where he made use in of the ambiguous word "reason" and in of the expression "power of thinking" to denote a special mental capacity:.

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    The senses present us with something external and because of this it is easier to comprehend how mistakes can occur than it is in the case of the logical source of knowledge which is wholly inside us and thus appears to be more proof against contamination. But appearances are deceptive.

    For our thinking is closely bound up with language and thereby with the world of the senses. Perhaps our thinking is at first a form of speaking which then becomes an imaging of speech. Silent thinking would in that case be speech that has become noiseless, taking place in the imagination.

    Words without Objects: Semantics, Ontology, and Logic for Non-Singularity

    Now we may of course also think in mathematical signs; yet even then thinking is tied up with what is perceptible to the senses. To be sure, we distinguish the sentence as the expression of a thought from the thought itself. We know we can have various expressions for the same thought. The connection of a thought with one particular sentence is not a necessary one; but that a thought of which we are conscious is connected in our mind with some sentence or other is for us humans necessary.

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    But that does not lie in the nature of the thought but in our own nature. There is no contradiction in supposing there to exist beings that can grasp the same thought as we do without needing to clad it in a form that can be perceived by the senses. But still, for us humans there is this necessity. Language is a human creation; and so humans had, it would appear, the capacity to shape it in conformity with the logical disposition alive in them. Certainly the logical disposition of humans was at work in the formation of language but equally alongside this many other dispositions — such as the poetic disposition.

    And so language is not constructed from a logical "blueprint" Here, Frege explains how it comes about that language in a certain sense "contaminates" the logical source of knowledge — that is, the faculty in us that enables us to have knowledge about logical structures and relations. As he sees it here, this logical disposition in us is not identical to the ability to speak a language, although it is required for the development and acquisition of a language.