The Commens Dictionary
Quote from ‘Short Logic: Chapter I. Of Reasoning in General’
A proposition asserts something. That assertion is performed by the symbol which stands for the act of consciousness. That which accounts for assertion seeming so different from other sorts of signification is its volitional character.
Every assertion is an assertion that two different signs have the same object.
‘Assertion’ (pub. 24.11.15-15:47). 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-short-logic-12.