Originally posted by photoptimist It may be true that words represent concepts but do we all have the same concept with any given word?
A child might learn the word "tree" but then misapply it. The child might fail to recognize a sprouting acorn as an oak tree -- a false negative. Or the child might falsely say that a banana plant is a tree -- a false positive. Moreover, many of the adults around the child might make the same mistakes which then reinforces the child's erroneous concept of a tree. But if a social group shares the same "erroneous" concept of a given word, then maybe that's not problem because the principle purpose of words is communicate so mutual agreement suffices. It may not be until misconceptions affect actions that problems might arise such as trying to cut down banana plants for timber or firewood or killing all the oak sprouts in the forest on the assumption they are non-tree weeds.
It's worth noting that "there is no universally agreed upon definition of 'tree' even in a strictly botanical sense. While it is initially a question of grouping plants with similar characteristics, it is ultimately a function of subjective criteria that change from context to context." (
University of Miami | College of Arts & Sciences | John C. Gifford Arboretum | Smartphone Tour | What is a tree?) The physical world is like that -- it laughs at humanity's quest to create neat little concepts.
The only realms of human thought that can have precise definitions are the artificial realms of math and logic where axioms can define a set of discrete symbols and operations. As soon as one delves into the real world, things become messy, boundaries become fuzzy, and even the simplest math concepts are revealed to be only approximations. (For example true circles only exist in math, not in the physical world because a host of microscopic and macroscopic effects make pi as the ratio between diameter and circumference an approximation.)
Do we all have the same concept for a given word? Good question. This is where definitions come in and reading up on this, I found this unique perspective.
Quote:
It is often said that definitions state the meaning of words. This is true, but it is not exact. A word is merely a visual-auditory symbol used to represent a concept; a word has no meaning other than that of the concept it symbolizes, and the meaning of a concept consists of its units. It is not words, but concepts that man defines—by specifying their referents.
The purpose of a definition is to distinguish a concept from all other concepts and thus to keep its units differentiated from all other existents." Unquote
Definitions are absolute only in a given context, not future contexts that may include facts yet unknown. Take the definition of "man" (Man is the rational animal.) Certainly in the current context of our knowledge, the power of reason (Reason integrates man’s perceptions by means of forming abstractions or conceptions) is the fundamental distinguishing characteristic compared to other animals. Assume an alien from space arrives and happens to be an unusual animal with the ability to reason. In that case, our definition would not hold and some other distinguishing characteristic would need to be found.
The reason mathematical definitions hold all the time is because they exist in a frozen context. Euclid geometry exists in its own world, not the world of curved space where the shortest distance followed by a lightbeam may not be a straight line.
---------- Post added 14-02-20 at 07:51 ----------
Originally posted by dlh No, not deluded at all. My eyes report the reality of true color, as it exists in my world. I know, for example, that this mythical thing people keep referring to as "red" is merely some imaginary construct of their "big brain" that needs to express some emotional drive for balance in the universe. (I don't see it, so it doesn't exist. Ultimately a theological question - just ask Richard Dawkins.) It's a good question whether one could determine a degree of color-blindness (which I refer to as "wolf-vision", since I'm not fooled by color-based camouflage and can see in what other people think is total cave-darkness.) by an examination of the retina. As far as I know, no one has ever tried to figure out the physiological manifestation of that genetic characteristic. My personal hypothesis is that there are fewer color photoreceptors per unit of retinal surface, with a concomitant increase in "pixel pitch" for luminance, since the black/white photoreceptors are relatively tiny by comparison.
And, by the way, there's also the famous example of Inuit which has no word for "white", but fifty-two specific kinds of shades/tints that, in English, would be "white".
One more thing: it's my understanding that the Sapir-Whorf hypothesis only said that people can't normally think of things for which they have no words. I don't really buy it, myself, since I often imagine as many as six impossible things before breakfast! (as does the Red Queen).
Quote: One more thing: it's my understanding that the Sapir-Whorf hypothesis only said that people can't normally think of things for which they have no words. I don't really buy it, myself, since I often imagine as many as six impossible things before breakfast! (as does the Red Queen).
One cannot think if one doesn't use concepts and words represent concepts. Certainly we can have fanciful concepts, but note they will have their roots in basic perceptions. Take the Unicorn. It is imagined from previous perceptions of horses and horns. Pegasus the flying horse is imagined from similar perceptions of flight and a horse. How is it even possible to think of things when there is no concept (word) of them?
The six impossible things you imagine before breakfast would involve words describing them,