Far too often, I see answers that are one-liners, wholly unsupported throwaways and downright terrible answers to questions of an OP.
These questions fall far short of our community's "Show your work" guidelines. In fact, reviewers often have to point new users to this meta post or this meta post outlining the "show your work" rule.
In the past, one of the valid methods of dealing with this discussed was to delete the post, yet in the reasons for deleting a post, there is no option for "Does not meet community scholastic standards." Instead, select "No comment needed," when a comment is in fact needed, but there is no suitable option for deletion.
We do, of course, have the option to add yellow box messages (Or at least some do; I do not), and these are automatically added in some cases when an answer is deleted.
Furthermore, because there is no option to delete scholastically anemic and unsupported answers, many are simply not deleted. For newer reviewers, it tends to imply that crummy answers shouldn't be deleted as long as they do technically, in fact, answer the question no matter how awful an answer they are.
I would suggest that we add a reason for deletion if possible and attach an automatic banner message noting and linking to our show your work requirements. This will also help to better codify site requirements. Something along the lines of
This answer does not show its work which is a requirement on this site and it does not meet our community's academic standards. You may improve this answer by editing it which will place it into the review queue. If the answer is revised to meet the community guidelines and standards, it will be reinstated after review.
Is something like this possible? Does anyone have suggestions for a better message?
and these [yellow boxes = post notices] are automatically added in some cases when an answer is deleted-- to my knowledge, these are always added manually by a diamond mod.