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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, I mean 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 frequently
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

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