I agree.
I imagine it would also be safe to say that plants meeting the above definition AND succeed in evoking an inspiring emotional response cross over into the realm of art.
Oops, sorry, I arted.
Will
Not familiar with art as a "realm" - you'd have to define that, Will.
On re-reading, it occurs to me that the definition I offered also addresses several other "realms" that people touch upon here, so let me ramble on further.
Once again, my definition indirectly addresses, or points to, the separate issue of whether or not a particular bonsai succeeds in evoking the desired emotional response in the viewer, i.e. whether or not a bonsai is "good" or not, whether it achieves the goal for which it was created.
But also, the definition points to the original question of this thread, which was not necessarily just about definition, but about WHEN, exactly, a tree that otherwise fulfills the definition also is capable of evoking the desired emotional response in a viewer. If we assume that the word "viewer" will also include the artist himself, then I imagine that there is a point in the development of each bonsai's creation (as with a painting or sculpture) when it no longer becomes for the artist a mere "work-in-progress," but an actual bonsai. I imagine that this moment is defined for the artist when he (yes, women are also included, but it's finally getting to be OK in most writing circles to simply use ONE gender for pronouns again, thank God!) - when he steps back with the realization that the tree he has been working on now evokes something of the desired emotional response in him, with the extrapolation that it would then also be likely to do so for others he might want to show it to, other viewers.
Only THEN would he consider the tree a bonsai, and show it as such, even if it is still in need of ongoing refinement, as is always the case. For instance, before then he might post it here on BNut as a "work-in-progress," and the photos would be designed to primarily show the work underway, whereas later, when he considers it to be a bonsai and therefore thinks others might also do so, he would post a different, "better" picture that down plays the ongoing work in progress and instead emphasizes or "displays" that which helps to evoke the inspiring emotional response in himself and others. This then gets into the entire "realm" of display that some folks touched on here.
This also touches on discussions related to the level of the artist. As with painting or sculpture, different bonsai artists at different levels of expertise, and traveling in circles at different levels of bonsai appreciation, might have a different set point for the shift from work-in-progress to bonsai. Someone posting for peers in the beginners section of a forum might correctly post a tree they, and their peers, correctly would call a bonsai - one which evokes an inspiring emotional response. And yet, that same tree in the hands of a master might be viewed as a mere early work-in-progress, or as an example of something fairly hopeless of ever becoming a bonsai they would display for their peers.
Anyway, just some more thoughts.
G52