The Commens Dictionary
Quote from ‘On the System of Existential Graphs Considered as an Instrument for the Investigation of Logic’
…assertion does not add a new element of thought. For an assertion is not a thought but a deed. If one goes before a notary and takes one’s affidavit to a statement, that is nothing but highly emphatic assertion.
MS [R] 499
‘Assertion’ (pub. 24.08.17-12:04). 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-system-existential-graphs-considered-instrument-investigation-logic-4.