Do sortal concepts (or sortal conceiving) exist in the absence of conceiving beings?
If no, and if Saturn's independence of sortal concepts is implausible, then there cannot be a Saturn without such beings.
If yes, then what exactly is this 'minimal conceptual ground' which is independent of conceiving beings? And how can we maintain such a ground without reverting to idealism? — csalisbury
Following Frege (or maybe, Wiggins' construal of Frege in his
The Sense and Reference of Predicates: A Running Repair to Frege's Doctrine and a Plea for the Copula) I tend to distinguish conceptions (our specific, yet communicable, understandings of a concept) from concepts. A general concept (such as a property) predicated of an object yields a truth value, true or false, accordingly, whether the object has or doesn't have the property. All those notions (concept, object, truth value) belong to the realm of reference (
Bedeutung) according to Frege. (Which is rather more restrictive than to say, with Quine, that they are values of bound variables).
Sortal concepts are a special kind of general concepts rather unlike properties or relations. That's because objects can't have them accidentally. An object such as Saturn can't cease to be a planet, just like President Obama can't cease to be a human being. If something (a large celestial mass, say) ceases to constitute a planet, for some reason, then this celestial mass can't constitute Saturn anymore. It constitutes, at best, a remnant of Saturn. So, sortal concepts are rather akin to essential properties. But it can't be an
a posteriori law of nature (something empirically discovered) that Saturn essentially is a planet. It is rather more akin to a conceptual truth.
We grasp sortal concepts through forging conceptions of objects (understandings of what they are). Sometimes, we also contribute in setting up some of the conditions of their existence, as is the case for functional artifacts and many social objects (monetary tokens, chess pieces, etc.) Our conceptions are, according to Wiggins' Frege, the senses (Fregean
Sinne) of predicates that refer to concepts. A conception just is an understanding. It may be correct or incorrect and hence is beholden to the object it aims at being an understanding of (or of the laws of nature the object is governed by) for its correctness. Sortal concepts determine the criteria of persistence and individuation of objects that fall under them. Someone's
conception of the sortal concept under which an object such as Saturn falls can be mistaken. The reason why this conception (how it is understood for something to be a planet) is beholden to Saturn for its correctness is because Saturn is the focus of a scientific inquiry. This inquiry is objective just because it has a point -- it discloses interesting and predictable features of phenomena, and objects (such as Saturn) as resilient patterns in the midst of those phenomena. We can adjust our conceptions of object in order to track the objective features that they really have, but this means no more an no less than that our conceptions of the objects that populate some empirical domain (astronomy, say) successfully discloses patterns that we are interested in (because they afford prediction, control, explanation, etc.).
What empirical inquiry reveals is first and foremost the discloseability of intelligible objects within some intelligible mode of empirical investigation (which need no be scientific). Discolseability is a modal notion. Actually existing objects, and the empirical domains that are a part of, need not be actually disclosed in order for them to exist, i.e. to be disclose
able. So, thus far, there is no threat of idealism involved in the Fregean account of sortal concepts.
What I was invoking with the idea of a "minimal conceptual ground" just is a minimal understanding of the objective sortal concept an object may fall under when it is identified empirically (maybe perceptually) as being a material object at all (rather than, say, an utterly confused bundle of sensations). I am not claiming that this understanding must be actual in order for the object to exist. My point rather is that if we abstract from even such a minimal understanding of the persistence and individuation criteria that determine what an object might be, then we can't make sense of it potentially being the focus of a protracted and systematic empirical inquiry into what it really is. That is, we must start with some understanding in order for our empirical investigation (our experiences) to rationally bear on our initial understanding (that's the inescapable theory ladenness of experience). But since there always must be some such initial understanding, and this understanding is at play in acts of receptivity (empirical inquiry) this background is transcendental, in the Kantian sense. This transcendental background consists in the discloseability (to us) -- of objective Fregean concepts -- not subjective conceptions. It is not
transcendent. Concepts are 'objects' of empirical inquiry. So this background is in play, and objects can exist, even before, or without, any actual understanding (conceptions) by us. And yet, those objective concepts only are objective inasmuch at the patterns that they potentially disclose are intelligible
to us (rational embodied enquirers). One may call that conclusion conceptual idealism (or pragmatism). But I think such an 'idealism' is innocuous from a naturalistic point of view since it also is a form of realism and it furnishes an account of the objectivity of empirical judgment.