Page 13 - Mark Gommers "Bowlines Analysis

Tiable In the Bight (TIB)

TIB means that the knot can be tied without access to either end. The reverse also applies –
in that the knot can be untied without access to either end. Dan Lehman reported that the
TIB concept most likely had its roots circa 1987 through the work of two innovators – John
Smith and Pieter van de Griend – via a simple lock Bowline reported in ‘Knotting Matters’
issue #19, which also happened to be ‘TIB’.
Constant Xarax has posited that Bowlines with a Jones polynomial of 1 are TIB. In other
words, they are equivalent to the ‘unknot’.

One method of determining if a particular Bowline is TIB is to reverse engineer it.
Constant Xarax also posited that a typical feature of TIB Bowlines is that the tail exits
through the collar along a parallel pathway with the SPart. However not all Bowlines with
the tail so arranged are TIB – there are exceptions…

X  X 

#1010
Standard Scott’s Yosemite
Bowline locked Bowline
Bowline

The #1010 Bowline with ‘Yosemite finish’ is Tiable-In-the-Bight:

1 2 3 4
Yosemite
Bowline

Backflip

Page 12 of 59 Bowline Analysis Version 2.7a 16 July 2016 © Copyright Mark Gommers