Changes

'''Note.'''  The above transcription uses the "precedes sign" (<math>\prec</math>) for the "sign of illation" that Peirce customarily wrote as a cursive symbol somewhat like a gamma (<math>\gamma\!</math>) turned on its side or else typed as a bigram consisting of a dash and a "less than" sign.

'''Note.'''  The above transcription uses the "precedes sign" (<math>\prec</math>) for the "sign of illation" that Peirce customarily wrote as a cursive symbol somewhat like a gamma (<math>\gamma\!</math>) turned on its side or else typed as a bigram consisting of a dash and a "less than" sign.

==Graphic proof==

==Graphical proof==

Under the existential interpretation of Peirce's [[logical graph]]s, Peirce's law is represented by means of the following formal equivalence or logical equation.

Under the existential interpretation of Peirce's [[logical graph]]s, Peirce's law is represented by means of the following formal equivalence or logical equation.

| [[Image:Peirce's_Law_Figure_2.jpg|500px]] || (2)

| [[Image:Peirce's_Law_Figure_2.jpg|500px]] || (2)

|}

|}

==Bibliography==

==Bibliography==