UGC NET Question Paper 2021 - Set 1
Z.45
Some S is P
Some S is not P
Subalterns
Subcontraries
Contraries
Every S is P
No S is P
E
O
I
A
Subalterns
Contradictories
Contrary:
When two universal propositions differ
only in quality. By definition, both opposite propo-
sitions can be both false and true at the same time.
If one of them is true, the other must necessarily be
false. If one is false, the other may be true or false.
That is, if ‘E’ is true, then ‘A’ is true; ‘I’ is false
Sub–contraries:
Contrasting propositions can be
true simultaneously, but they cannot be false at the
same time. If one of them is true, the other ...
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