9

7

stood alone; and that it shall be the same with any other two replicas on the sheet, so that I now assert
not only that there is a ripe pear, but
also that it rains.

By calling this system a system of
_existential graphs_, my meaning is that two graphs
at different points of the board, _whether_
_far or near_, are both asserted, each
_just as much as if the other were not there_.

The most immediately useful information
is that which is conveyed in conditional
propositions, "_If_ you find that this is
true, _then_ you may know that that is
true." Now in ordinary language the
conditional form is employed to express
a variety of relations between one
possibility and another. Very fre-
quently when we say "If A is true, then B is
true," we have in mind a whole range
of possibilities, and we assert that among
all possible cases,every one of those