[judk]

Arbitrary choice in the face of uncertainty isn't wrong though; it is an aprroxumation technique.

"Room temperature" is arbitrary, but 75F is better than 100F or 0F

[SigmundA]

Any taxonomy is arbitrary. Nature / The Universe does not seem to organize things into neat categories. These taxonomies can be useful but imperfect abstractions. However IMO the organic / non-organic classification is a non-useful and misleading abstraction unlike the term "room temperature".