We now have _I_ and _A_ "asserting". Does this leave us free to make
what supposition we choose as to _E_? My answer is "No. We are tied down
to the supposition that _E_ does _not_ assert." This can be proved as
follows:--
If possible, let _E_ "assert". Then (taking x, y, and z to represent
Attributes) we see that, if the Proposition "No xy are z" be true, some
things exist with the Attributes x and y: i.e. "Some x are y."
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Also we know that, if the Proposition "Some xy are z" be true, the same
result follows.
But these two Propositions are Contradictories, so that one or other of
them _must_ be true. Hence this result is _always_ true: i.e. the
Proposition "Some x are y" is _always_ true!
_Quod est absurdum._ (See Note (A), p. 195).
We see, then, that the supposition "_I_ asserts" necessarily leads to
"_A_ asserts, but _E_ does not". And this is the _first_ of the various
views that may conceivably be held.
Next, let us suppose that _I_ does _not_ "assert." And, along with this,
let us take the supposition that _E_ _does_ "assert."
Hence the Proposition "No x are y" means "Some x exist, and none of them
are y": i.e. "_all_ of them are _not_-y," which is a Proposition in _A_.
We also know, of course, that the Proposition "All x are not-y" proves
"No x are y." Now two Propositions, each of which proves the other, are
_equivalent_. Hence every Proposition in _A_ is equivalent to one in
_E_, and therefore "_asserts_".
Hence our _second_ conceivable view is "_E_ and _A_ assert, but _I_ does
not."
This view does not seen to involve any necessary contradiction with
itself or with the accepted facts of Logic. But, when we come to _test_
it, as applied to the actual _facts_ of life, we shall find I think,
that it fits in with them so badly that its adoption would be, to say
the least of it, singularly inconvenient for ordinary folk.
Let me record a little dialogue I have just held with my friend Jones,
who is trying to form a new Club, to be regulated on strictly _Logical_
principles.
_Author._ "Well, Jones! Have you got your new Club started yet?"
_Jones_ (_rubbing his hands_). "You'll be glad to hear that some of the
Members (mind, I only say '_some_') are millionaires! Rolling in gold,
my boy!"
_Author._ "That sounds well. And how many Members have entered?"
_Jones_ (_staring_). "None at all. We haven't got it started yet
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