Disclaimer Notes

Some time ago I finally finished to play all the Five Nights at Freddy's games,

even if I was following the lore casually from quite some time, but knowing the general plotline

allowed me to notice some details which are often glossed over or forgotten. I'd like to share them with you -along with some cool MSPaint images everybody loves- because some are really cool, but truly because I want to discuss them with you in the comment section, since many of them can be explained in multiple distinct ways, in the most objective way as possible.

In each post of this blog, I want to focus the attention onto a specific detail (or theory) in the games, so we can search together for one or some possible explanations of it (with open-mindedness hopefully).

Terminology

When one makes a theory he should never be 100% certain of it, but he can always judge whether a theory could be closer to the truth or further to it by looking at the evidence and at the coesion of the overall story.
To convey these notions in a simple way, each post will have two indicators:

Likelihood meter: 0-100%
It shows how much I believe the theory is true with the evidence given, how much the given theory could be likely to be right. It goes from 0%=impossible to 100%=certain.

Impact: low/high

It indicates how much this theory being true or false affects other theories and the overall lore of the games, how much it impacts our understanding of the games.

Heartfelt request: in the comments please don't disregard somebody else's theory as impossible if there is no hard evidence against it. Please use the term "unlikely" instead since theories by nature aren't "right" or "wrong", but "more likely" or "less likely". And try to motivate your theories or thoughts as much as possible. You can consider a theory possible while not believing it fully. There are many nice theories that don't go well with each other, removing viable possibilities from our mind only hurts theorising.

I am also not a native english speaker so excuse me for the grammar mistakes I will likely make.