This is most difficult in the case of certain complicated mathematical propositions at which we only arrive by chains of syllogisms; for example, the calculation of the chords and tangents to all arcs by deduction from the proposition of Pythagoras.
Hori zailena proposizio matematiko konplikatu askoren kasuan izango da, noski, zeinetara ondorio-katea batekin bakarrik iristen baikara, h. d. adibidez, korda eta tangenteen kalkulua arku guztiei Pitagorasen teoremako ondorioen bitartez egitea;