…that Secundanity which consists in one man’s having a stature of 6 feet and another man’s having a stature of 5 feet is a degenerate Secundanity, since each would be just what he is if the other were not there, and would be Second in the same way to a merely possible but non-existent man.
http://www.commens.org/dictionary/entry/quote-letters-mario-calderoni-7