The matter which the Graph-instances are to determine, and which thereby becomes the Quasi-mind in which the Graphist and Interpreter are at one, being a Seme of The Truth, that is, of the widest Universe of Reality, and at the same time, a Pheme of all that is tacitly taken for granted between the Graphist and Interpreter, from the outset of their discussion, shall be a sheet, called the Phemic Sheet, upon which signs can be scribed and from which any that are already scribed in any manner (even though they be incised) can beĀ erased.
http://www.commens.org/dictionary/entry/quote-prolegomena-apology-pragmaticism-37