The Commens Dictionary
Quote from ‘Existential Graphs’
The assertion of that which is unintelligible (i.e. absurd) not being a graph shall be called the pseudograph, and may be represented by filling the entire area in which it is, so as to leave room for nothing else.
MS [R] S28:33
‘Pseudograph’ (pub. 18.03.18-14:11). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-existential-graphs-8.