What is "FEFO"?

And no it's not "First Expired, First Out" even if that's what Google tells you.

Fefo is the name of my little bunny sona and also my nickname. Back in February of last year I set my name to "Fefo" in a friend's server because of this Urban Dictionary entry:

 

I thought it sounded silly but it ended up sticking! I am a "wierd thingy" after all. It's more fun & quicker to say than my actual name so sometimes I refer to myself as "Fefo" in third person... maybe I'm growing senile in my old age.

But it wasn't until December 2024 when my dear friend gave me the idea to name my sona Fefo... up until then I called her "Bunnylexis". Which was such a genius idea I'm shocked I didn't think of it earlier.

So that answers the question (that nobody asked) of Who is Fefo. But WHAT exactly is she??

Please consult the image below:

As you can see, all Fefos have at least one of two things:

1. Bunny-like ears
2. Ponytail

"My sister has a ponytail, is my sister Fefo?" "Is a Border Leicester considered Fefo?"
No to both - in fact, British mathmatician I. J. Good presented an argument against this line of thinking back in 1960, which goes as follows:

suppose that there are N objects that might be seen at any moment, of which r are Fefos and b are bunny-eared or ponytailed, and that the N  objects each have probability  of being seen. Let Hi be the hypothesis that there are i non-bunny-eared or non-ponytailed Fefos, and suppose that the hypotheses H₁, H₂  , . . . , Hr  are initially equiprobable. Then, if we happen to see a bunny-eared or ponytailed Fefo, the Bayes factor in favour of H₀ is 

What does that all mean? I don't know! I stole it from Wikipedia.

But to actually answer those questions, well... the answer is still no! Fefo can never be another person except for herself, and unless she's drawn as a Border Leicester, then she's not one of those either.

Maybe it's easier to say all Fefos (unless referring to me) are 2D?

... Wait ...
 

God. Damn it.