all categories are subjective, including "canon" and "not canon." "canonicity" is more of a matter of epistemological authority: who gets to decide whats 'true' and whats 'not true' about a story or character? adding more arbitrary subcategories or more strictly defining them wont actually help you answer this question, because the truth is its impossible to be "correct" about something made up. its made up. why do you get to decide what the playground lego toy "really" does, or what its "really" like? you can make whatever appeal to authority you want about whats "canon," at the end of the day it will never actually be more 'correct' than anything anyone else might say about it.