Or, taking a privative term for our subject,
Some unpractical persons are statesmen.
.'. Some statesmen are not practical.
§ 509. When the inferences just given are analysed, it will be found that the process of simple conversion precedes that of permutation.
§ 510. In the case of the E proposition a compound inference can be drawn even in the original order of the processes,
No A is B.
.'. Some not-B is A.
No one who employs bribery is honest.
.'. Some dishonest men employ bribery.
The inference here, it must be remembered, does not refer to matter of fact, but means that one of the possible forms of dishonesty among men is that of employing bribery.
§ 511. If we analyse the preceding, we find that the second step is conversion by limitation.
No A is B.
.'. All A is not-B (by permutation).
.'. Some not-B is A (by conversion per accidens).
§ 512. From A again an inference can be drawn in the reverse order of conversion per accidens followed by permutation—