Take the following example text:
... Such causes will generally fall under one of:
- Diagnostic ...
- Avoidance of ...; and
- Relief of ...
The legitimacy of all causes other than 1 is doubtful.
The thing I don't like about this is that just putting undecorated numerals could in some contexts create confusion. (While the above is not the best example, one could conceivably think that "1" was meant to mean a single cause.)
I have at times done this:
The legitimacy of all causes other than #1 is doubtful.
But this somehow feels messy.
The legitimacy of all causes other than (1) is doubtful.
Seems a bit messy since parenthetical text is normally not essential to meaning.
The legitimacy of all causes other than 1. is doubtful.
Seems messy among other things because it almost looks like the "1." is meant to set off a list item at this point in the text. That's also somewhat true for "(1)".
Is there any well-defined English rule for referencing list items by numeral, or is there any widely accepted style guidance on this matter?