Furthering the relevance, raised by Taney and Sarah, of the contemporary cognitive and neuro-sciences to the possibilities of reevaluating the role of form and meaning in art (and the arts): I'd like to put forth the idea of "4E" cognition, recently popular in those fields. The idea, basically, is that human (and animal) thought is embodied, embedded, enacted, and extended. (I'm linking below to a short video by philosopher Shaun Gallagher, which offers a succinct account of each of these intertwined dimensions.)
I can perhaps be forgiven for the naiveté of my speculations here as a non-academic (I trained as a painter and am active as a newspaper art critic). But I think a brief consideration of these "E's" might help clarify some of my misgivings, raised tentatively in an earlier post, concerning the radical critique of humanism being bandied about here. (If we are challenging binaries here, I think the humanism/post-humanism dichotomy is fair game too, especially given the moralistic shadings being offered by some participants.)
The notion of embodiment, shared I think by everyone here, is one that clearly ties us to our creaturely, more-than-human natures. As I wrote earlier, "Our capacities for abstract and deliberative thought are rooted in those for perception and affect." I'd reckon as well that it provides directly for an at least modest human uniqueness (Gallagher, below mentions hands). I think it offers a challenge both to the rationalist-intellectualist view of the radically autonomous ego but also to postmodernist views concerning a radical decentering of self and agency.
Without going into detail, the idea behind embeddedness, enaction, and extension pertain to the fact that thought is an active process that takes place in an ecological setting--which for many species at least, is a socio-cultural as well as a narrowly physical one. We are in of our habitats and milieus. Again, and without wanting to draw a sharp boundary between humans and other animals, I would venture that what is most distinctive about homo sapiens is our elaborate and cumulatively extended cognitive ecology. I believe that this pertains to art as a human practice and I'm willing to argue further that it is not mere chauvinism to say so.
Shaun Gallagher's video Q&A, recommended.