Images of the analysis performed with counter-image 7c. (a) Original counter-image 7c with its two knots, 7c₂ and 7c₄, indicated with red circles. (b) Counter-image 7c predicted with case 2b with its two knots highlighted. (c) Original counter-image 7c (Fig. 9a) combined with the fit to a circle of the two knots (red dots) from the above prediction (Fig. 9b) so as the shift between both pairs of knots (original and predicted) can be better appreciated.