You can’t come out of a good square knot. That is all you need to know.
You cant come out of a good square knot.
Having lived in the Great State of Texas for some time, I knew cowboys and goat ropers.
Many had a wide knowledge of knot tying, but they always were amazed by this one.
A square knot on the right cord will hold ok but getting it snug and keeping it tight, not so much.
The thin wiry ones and females are often very good at getting out.
But not with this one.
See #6.