112

16

of expression which I am expounding, the word rhema us used in logic to denote any proposition and any blank form which would become a proposition if every one of its blanks were filled with a proper name.
Thus the following are rhemata

Cain killed Abel
Cain killed __
__ killed Abel
__ killed __

In this system every expression of a rhema whose meaning the diagram does not analyze is called a spot.
Around this spot are places where dots may be placed so as to produce graphs, that is assertions expressed in this system.
Thses places round a spot where the dot may be places are called its hooks.
I have now told you the substance of Convention No 4.