There is no one "right" answer to this, but if I would do this, I would have a shallow (one or two level deep) hierarchy where I keep all my atomic notes. (e.g.

food.burgers-should-be-wide-not-tall

Or even just

burgers-should-be-wide-not-tall

) There is no enforcement of hierarchical structure in Dendron. It is just another way of organizing. If you want to apply a more rigid structure here, you could always keep the file name short, but titles as clear statements. (e.g.

f.m.burger.ff.bp.wide-not-tall.md

, and

title: Burgers Should be Wide not Tall

in frontmatter.) The wikilink for this would then be

[[Burgers Should be Wide not Tall|f.m.burger.ff.bp.wide-not-tall]]