There is no particular reason dual_persona is different from 3+ persona (multiple_persona). Many other "multiple" tags, like multiple_girls, multiple_views, all include the case of two. (Well, multiple_arms is 3+, but for obvious reasons.) Should dual_persona be a special case of multiple_persona instead of being disjoint with it?

A big reason to make the suggested change is so that age_comparison can then imply multiple_persona.

-1. Read up on previous discussions: topic #3681, topic #4980.

EB said:

I'd kind of like at least one "catch-all" tag, though, so if "dual_persona" can't be used for 3 or more, then I'd like this to be used for all 2+ images (by way of implication).

Actually the OP of topic #3681 seems to have the same suggestion, and no one explained why this would be a bad idea (some people explained why duality deserves a separate tag, but that doesn't conflict with having multiple_persona be catch-all). It was just lost in the discussion.

topic #4980 does convince me that having age_comparison imply multiple_persona is not appropriate (but then we need to edit the wiki of the former!).

By the way, the post that led me here was post #1436988. I tagged it multiple_persona based on similar posts being tagged as such, but after reading topic #4980, should that be character_sheet instead?

I said that, but honestly I think I agree with what was ultimately decided on there. 3+ forms is rarer and separate tags makes searching that easier. If multiple persona becomes catchall, it's possible to search using multiple_persona -dual_persona but that would exclude images where one character has 2 forms and another has 3+ forms such as post #1881887 or post #2848340.

EB said:

I said that, but honestly I think I agree with what was ultimately decided on there. 3+ forms is rarer and separate tags makes searching that easier. If multiple persona becomes catchall, it's possible to search using multiple_persona -dual_persona but that would exclude images where one character has 2 forms and another has 3+ forms such as post #1881887 or post #2848340.

I guess if age_comparison (and many other tags) doesn't imply multiple_persona, then there is no big advantage of having multiple_persona be catch-all.

The catch-all tag I need is probably one that covers clone, dual_persona and multiple_persona, since it can be hard to distinguish between clones and interacting personae.