Scientific American photo caption —
"Monday, November 2, marks the 200-year anniversary
of the birth of the man who put True/False, 0/1, and
AND/OR and NOT on the map."
See Hardegree's Symbolic Logic on "and/or" and its purported use
"to avoid ambiguity in legal contracts." His book is NOT recommended.
See also Bryan Garner in the ABA Journal on "and/or" in legal usage,
as well as a post in this journal, The Witch of And/Or.