if we place them in the order
placing the B’s first and those which are b’s last, we shall perhaps overlook the law of correlation of properties involved. But if we arrange the combinations as follows
it becomes apparent at once that where A is, and only where A is, the property C is to be found, B being indifferently present and absent. The second arrangement then would be called a natural one, as rendering manifest the conditions under which the combinations exist.
As a further instance, let us suppose that eight objects are presented to us for classification, which exhibit combinations of the five properties, A, B, C, D, E, in the following manner:—
| ABC d E | a BC d E |
|---|---|
| AB cde | a B cde |
| A b CDE | ab CDE |
| A bc D e | abc D e |
They are now classified, so that those containing A stand first, and those devoid of A second, but no other property seems to be correlated with A. Let us alter this arrangement and group the combinations thus:—
| ABC d E | A b CDE |
|---|---|
| AB cde | A bc D e |