Discussion
In the question given below has a set of three or four statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.
Statement -
A. All cats are mad. All sick persons are mad. So, all sick persons are cats.
B. All oranges are white. All figs are oranges. So, all figs are white.
C. No man can crawl. No kite can crawl. So, all men are kites.
Answer: B
Correct answer: B
In B the reasoning runs through: all figs are oranges and all oranges are white, so all figs are white. A commits the same fault as before - cats and sick persons are both mad, which does not make them each other - and C draws a positive conclusion from two negative premises, which is never valid.
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