Jevons formuleerde al vroeg in zijn carrière de leerstellingen die zijn meest karakteristieke en originele bijdragen aan de economie en logica zouden vormen.
Jevons, portanto, faz a distinção entre verdade e aplicabilidade ou percepção, sugerindo que esses conceitos eram independentes no domínio da geometria.
Jevons's contribution to the marginal revolution in economics in the late 19th century established his reputation as a leading political economist and logician of the time.