2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/215982Classifying the strengthes of three-body forces 3BFs with the condition that observables must be cut-off independent, i.e. renormalised at each order, leads to surprising results with relevance for example for thermal neutron capture on the deuteron. Details and a better bibliography in Ref. [1].3 pages LaTeX2e, including 1 figure as .eps file embedded with includegraphicx. Uses FBSart (included). Contribution to the 20th European Conference on Few-Body Problems in Physics EFB20, Pisa (Italy), 10th -- 14th September 2007. To be published in Few-Body SystemsNuclear Theorytext