Sheffer was briefly married and lived most of his later life in small rooms at a hotel packed with his logic books and vast files of slips of paper he used to jot down his ideas.
Sheffer oli lühikest aega abielus ja elas suurema osa oma hilisemast elust väikestes hotellitubades koos oma loogikaraamatute ja tohutu hulga paberilipikatega, kuhu ta oma mõtteid kirja pani.