Analysis is clearly being understood here in the regressive sense as involving the working back from 'what is sought', taken as assumed, to something more fundamental by means of which it can then be established, through its converse, synthesis.
In this sense of conversion, the passage from a proposition to its converse is not, in general, a valid inference; and though often a mathematical proposition and its converse may both hold, separate proofs must be given for each case.
But the original doctrine of conversion says that an I form and its converse always have the same truth value, and that is false on Strawson's account; if there are As but no Bs, then 'Some A is B' is false and 'Some B is A' has no truth value at all.
The only threat to the social order is a group of anarchists, who are plotting to reinfect society, so that mankind "may not only fully know pain and suffering, but also its converse: joy," as one handbill puts it.
The key observation for obtaining C is simple: in the presence of the double negation introduction law, it suffices to validate both BT′ and its converse ~(A → B) → (A → ~B).
In [10], it was investigated that ⪯ T implies the natural order but its converse needs not be true.
But I propose that we think not about how such a case differs from its converse, but about how they are actually similar.
Where Professor Quine had argued that sentences like No. 2 above were unintelligible, the Barcan formula (together with its converse) renders the first and second sentences logically equivalent.
Under the deal, Nike will be able to use N.B.A. stars in uniform to promote the Nike brand and its Converse and Jordan brands.
That you could go from running to lifeless on the ground that quickly laid bare the randomness of death and its converse: the fragile randomness of life.
If the image of the Indian female as victim is true, so, too, is its converse: the Indian woman who coexists as a strong survivor, as conqueror, as worshiped goddess made flesh.
