They responded: Of course, this piece of shit on the plate symbolizes what people are fed throughout their lives - either literally eating unhealthy foods (shit) or more theoretically through the bullshit they encounter throughout their lives. The artist was trying to convey a message about life: everything can be, or is, shit being fed to you on a platter.
Disclaimer: I made all of this up on the spot, but I have seen shit on a plate being passed as art before. So it was partially inspired, which I guess makes the dog shit on a plate art. By some standards.
(In Poland we have this urban legend about granddaughter of Stanisław Lem getting a bad grade on an assignment about interpretation of Lem's work, even though she went to his grandfather, asked about "what he intended" and wrote what he said verbatim.)
Interpreting works of art is fine, seeking new meanings, getting inspired, etc. is also fine. Just call a spade a spade. Otherwise it's just a particularly insulting intellectual dishonesty.
My experience is of being an analytical whiner throughout school, and then suddenly understanding the point when it was explained to me by a fellow analyst in university. I can't help wondering how much more I (and others) may have enjoyed English if someone had explained it sooner.
And I think you're completely missing the point -- the author's intention is not unknown, it is irrelevant, since the purpose of literature is not to explicitly convey a simple intention, it is to provoke a reaction in the reader; we first experience the art and second analyze which pieces of it are effective to make us feel how we feel. Intention of the author isn't interesting or meaningful. And to misunderstand that is to misunderstand art itself, which is why we see here people suggesting we "call a spade a spade" -- whatever that means.
And realistically your teacher probably knows a lot more about what the author intends than you do. There is a lot of historical context and other works that put the novel into context. But that's not even relevant; you're being taught to think and look for examples, it doesn't really matter if they were put there intentionally. When you develop your abilities and are good enough to think about literature past the high school level then you can start thinking for yourself, just like in every field, but when you're intellectually a child in the field, you need to listen and learn. Unfortunately most children are petulant and whine and decide since they don't understand it yet, it must be nonsense, and everyone who is an expert and has dedicated their life to it "didn't have any clue" and give up. Like you see here.
Everyone has a perspective, and all perspectives are fundamentally interesting in their own right. Is that not the humanist idea? Is that not what a liberal education is supposed to teach?
You're correct I come off as a little defensive, but this thread is full of obnoxious condescending engineers who think since they know some math and science they are better than everyone at everything, and that everything they don't understand is because it's not worth understanding. It is full of people attacking art because "it's useless, I didn't get it so it's trash and anyone who pretends to is a liar and I'll have fries with that English major scum LOL" And I'll attack that attitude with the ferocity it deserves; it's disgusting and a disservice to all of us.
I'm a scientist as well so I'm of course sympathetic to those who aren't particularly interested in the humanities and I think that's just fine but in a toxic environment like this I'll go out of my way to defend them aggressively since far too often I see people just roll over.
I suspect people who whine about "what the author intended" or that "you can make it up as you go along" really lack the mental/creative flexibility to wrestle and dance with art and miss the point that the act of interpretation is a purpose in and of itself: you express art/ideas by interpreting another's work; your interpretation is art itself since art is a conversation. It's the job of artists to create a work that's deep and flexible and inspiring enough to generate many possible interpretations.
Not everybody has to like it but don't just dismiss it out of hand, recognize that brilliant creative people find value in it and the value is there, it just takes work to get at it just like it takes work to find beauty in well-written code or a system of complex equations, and it's a wholly different kind of satisfaction and beauty you find in the humanities; if you took the time and effort to honestly try it you might like it and like it or not that kind of expansion of the mind is something everyone could use a little more of.