Seeking clarity on canonical entities via examples:

Could "running shoes for wide feet" be a canonical entity? At what point does adding a modifier create a distinct core intent rather than a variation of the same intent?

For service providers, say an IP lawyer: "IP lawyer", "trademark lawyer", "patent litigation lawyer"... which ones are canonical? My guess is that hyperfocused practices exist and therefore each of these could be canonical. In that case, what would make the term non-canonical?

Thank you for sharing your research.