Great thread, wonderful and thoughtful posts.
I was drawn into this type of debate a number of years ago while or shortly after attending IIT. I studied engineering, but was drawn more to the design and architecture crowd (it might have been as simple as that they actually seemed to have fun, but it probably was something more). Back then and for a number of years my friends had an ongoing debate about the distinction between artistry and craftsmanship.
As an engineer I definitely had no skin in this game, so I mostly listened. The consensus, or perhaps it was just my conclusion from listening, was that art is in some way heroic and new in a way that craftsmanship was not. But, and equally important, there was a secondary consensus that great craftsmanship is probably effectively indistinguishable from art.
Conclusion 1: there is no definition of art that draws a clear line between art and great craftmanship.
Again, looking at this as an engineer, I had to ask myself then, and now you this question - what purpose does the distinction between art and craftsmanship serve? The answer seems pretty clear to me - it is to exalt the work of some, and degrade the work of others. Nothing in this thread has changed my opinion of this.
Conclusion 2: if someone calls one thing art and another not, their purpose is to put down the thing that is not art because they do not like it.
And I take that to be the intent of the OP. Some chefs and eaters are exalting their work by declaring it to be art, and he wishes to degrade it by denying it that heroic status. Art, after all, has high intrinsic value that other things do not have. Everything else just has value based on its utility and/or its commercial value.
I have been fortunate enough to see and enjoy many beautiful things in my life. Some were naturally created, some were man made. Some were clearly intended to be beautiful, many were not. Many were ephemeral, while others offered at least the illusion of permanence. Some were as utiliatrian as a building, while others were as useless as a snowflake. I am loath to try to rank them in some way, saying that the great burrito I have at La Pasadita is better than the rainbow I saw yesterday afternoon, or that La Grande Jatte is better than the smooth perfection and balance of a well-made knife. That is not to say that the pleasure I get from each is not different, or that the pleasure I get from some is not more intense, or more enduring - of course, I enjoy some of these things more than others.
(In rereading this I note that I have somehow assumed that art is something that is pleasing, which is not necessarily true but I still like the way I worded it so allow me the license and forgive me the erroneous implication, please).
But art is, forgive the trite reference, like pornography - I know it when I see it, but I can't define it. And I know that my subjective judgment on where the line is drawn is nothing more or less than my subjective judgment with no more, or less, validity, than yours. I also understand that declaring something to not be art, or declaring it to be pornography, is to denigrate it, to put it a lower level than other things, declaring it to be a more base thing.
Don't get me wrong - I enjoy the discussion, and think there is much value in thrashing out these things even if the discussion does not have utility, but I do not think there will ever be or needs to be a resolution. And I understand that the intent of much of this is to come up with a justification that excludes the things I, or whoever is working on the definition, do not like.
So my definition is simple - art is whatever I think art is. If I had to characterize it further, I would call it something man made, intense, and highly evocative.
There is no reason food, or a post on LTHForum, cannot be art. Most of it is not of course, and in the culinary world, just as in the rest of the world, most of those who declare themselves artists are hacks looking for prestige and success through self-aggrandizement.
To reply more directly to the OP - food can be art, but most chefs who present themselves or are presented as artists are not. I suppose on some level I believe that the true artist creates because he is compelled to, and he knows and cares not whether what he does is art. The best art is humble, unexpected and offered freely, neither demanding nor expecting attention, praise or status.
You know, the LTH type of place.
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Feeling (south) loopy