Brockhaus-1911: Mundus vult decipi ergo decipiatur · Post hoc, ergo propter hoc · Cogito, ergo sum · Ergo
Eisler-1904: Cogito ergo sum · Cogitor, ergo sum · Cogito, ergo sum
Herder-1854: Ergo · Cogito ergo sum
Kirchner-Michaelis-1907: post hoc, ergo propter hoc · cogito, ergo sum
Mauthner-1923: post hoc, ergo propter hoc · Cogito ergo sum
Meyers-1905: Post hoc, ergo propter hoc · Mundus vult decĭpi, ergo decipiātur · Cogĭto, ergo sum
Pierer-1857: Post hoc, ergo propter hoc · Ergo · Cogito, ergo sum