[90] Ad absurdum führen, s. Absurd.
Brockhaus-1911: Deductio ad absúrdum · Credo quia absúrdum · Ad absurdum führen
Eisler-1904: Credo quia absurdum · Deductio ad absurdum · Credo, quia absurdum
Kirchner-Michaelis-1907: deductio ad absurdum
Meyers-1905: Credo, quia absurdum est
Pierer-1857: Ad absurdum