I'm not sure where to post this, but I'm super confused.
According to the TWYS policy, the only time you should tag with knowledge gained outside of the picture is regarding character names. That's fine, I get that. But why is it that pictures of Digby and Isabelle (two sibling characters from Animal Crossing) are labeled as "incest"? There is no way to judge this within the picture itself, and the fact they're related is outside knowledge.
Even more confusing, I've seen pictures of Digby by himself that are tagged as 'Ambiguous Gender', even though they are part of a series in which Digby is male - one picture in this series is the same level of 'ambiguous' as the other two, yet is able to be tagged as 'Male'.
So, what is it: can we use outside context when tagging pictures or can't we? What dictates when we can and when we can't, especially when the example above with the Digby set is inconsistent?