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Logical Reasoning
6.55
ASSESS YOUR LEARNING
105.
Identify the relationship between the propositions
'All mammals are warm-blooded' and 'Some birds
are warm-blooded.'
(a) Contradictory
(b) Contrary
(c) Subcontrary
(d) None of the above
106.
If one of the contraries is false, then the truth value
of the other is
(a) True
(b) False
(c) Neither true nor false
(d) Doubtful
107.
If one of the contradictories is true, then the other
must be
(a) True
(b) False
(c) Doubtful
(d) Neither true nor false
108.
Both the contrary propositions cannot be
(a) True
(b) False
(c) True and false
(d) Doubtful
109.
Of the two sub-contraries, ...

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