types of knots

[fuewybfunsfoiceoi]

Why is the majority of completed hanging, both partial(12%) and full(88%); using a slip knot?
Is there disadvantage to using a fixed knot?

Why does this cliche knot exist?:


source: https://www.sciencedirect.com/science/article/pii/S2090536X15000052

 

[JesiBel]

It is recommended to use a knot that tightens itself when weight is applied. To achieve more pressure and compressing uniformly the neck without leaving "empty spaces" in the ligature.

For example: Noose knot with stopper knot (also known as Arbor knot). It's simple and slides and adjusts easily.

Knot in action, video:

 

[Bootleg Astolfo]

I have so many furry friends that this title made me stop in fear for a second.