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knots depend on friction to do their job. Without enough
friction, slipping can easily occur.
Imagine you are trying to pull a log to your campsite that
you found in the forest. You tie what you think is a good
knot around the log and you start dragging it along the for-
est floor. It’s raining outside so your rope is wet and a bit
slippery. As you pull on the rope, there isn’t enough friction
between the parts of the knot so the working end starts
to slip through the knot. If you continue pulling, it’s possible
for the working end to slip enough that the entire knot will
become untied.

Some Knot-Tying Pitfalls 41