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19. |---|---|---|---| -------
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Let "periods" be Universe; m="days";
x="rainy"; y="tiresome".
Some m are x; &there4 Some x are y.
All xm are y.
i.e. Some rainy periods are tiresome.
N.B. These are not legitimate Premisses, since the Conclusion is really part of the second Premiss, so that the first Premiss is superfluous. This may be shown, in letters, thus:--
"All xm are y" contains "Some xm are y", which contains "Some x are y". Or, in words, "All rainy days are tiresome"