Suggestion:

Implication:
gnu -> wildebeest
wildebeest -> antelope

Reason:
Gnu is another name for the wildebeest, a type of antelope.

What if someone's tagging the OS?

Kclub said:
What if someone's tagging the OS?

I see no reason why that would be tagged by anyone, but it should be tagged gnu_operating_system.

720p said:
I see no reason why that would be tagged by anyone, but it should be tagged gnu_operating_system.

----> the joke

----> your head

It would be GNU_(operating_system) anyway. Although GNU without a kernel isn't much of an operating system.

What about GNU licenses?

furballs_dc said:
What about GNU licenses?

Presumably, that would be tagged gnu_license, since it's the license part that's more important for identification, and the GNU part only tells you which license it is.

Even so, the only things likely to be tagged gnu on e621 are pictures with wildebeests in them.

A group of gnus is called an implausibility.

ippiki_ookami said:
A group of gnus is called an implausibility.

http://www.platonicpillowtalk.com/wp-content/uploads/2011/04/The-more-you-know-by-deviantart-StathisNHX.png

gnu should be aliased to wildebeest, not imply it since they're 2 names for the same thing, not a super/sub-category set.