Page 12 - Gibson W.B. "The complete guide to knots"

side are the rare instances where a life has been spared
because somebody bungled the tying of a hangman's noose.

This suggests another important factor in rope work — it
is possible to tie a knot properly only to find that it is the
wrong knot for the purpose. Actually, this may be worse
than tying the right knot the wrong way, because the mistake
is seldom recognized until it is too late. Knots that hold
under some conditions will slip under others. This is a basic
principle of rope work, and also one of the most intriguing
things about the art.
All ties or fastenings that use rope or cordage fall into
three general classifications: knots, hitches, and bends. All
are "knots" in the full sense of the term, and there are some
ties which have more than one classification, their purposes
being interchangeable.
A knot, in the restricted sense, is a tie made in a rope and
usually requires the manipulation of only one end. Both ends
may be used when the rope is short enough. A hitch is used
primarily for attaching a rope to another object — a post,
ring, or what have you. This may automatically result in the
formation of a knot. Conversely, a knot may be converted to
a hitch.
A bend involves joining of two ropes so they will stand the
strain of being used as one long rope. Obviously, this can be
done by merely knotting the ends together. But a bend, in its
fullest meaning, signifies a "bending" or "binding" of ropes
to eliminate their slipping, particularly when they are of dif-
ferent size or make-up.
The classification of the tie is less important than the pur-
pose it serves, or its correct formation. Loosely speaking, you
begin your "knotting" with a single rope end, throw a
"hitch" when you attach it to an object, and "bend" two
ropes together. But, the practical way is to begin at the begin-
ning, namely with the loose end of the rope and the simpler
ways of knotting it.