Question
In the question below some statements are given
followed by four conclusions I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the statements and then decide which of the given conclusion definitely follows from the given statements, disregarding the commonly known facts. Statements: Few Facebook is Snapchat. All Instagram is Snapchat. No Instagram is Twitter. All Twitter is Telegram. Conclusions: I. Some Telegram is not Instagram. II. Some Facebook is Instagram. III. No Twitter is Snapchat. IV. Some Instagram is not Telegram.Solution
No Instagram is Twitter (E) + All Twitter is Telegram (A) → Some Telegram is not Instagram (O*). Hence conclusion I follows but conclusion IV does not follow. Few Facebook is Snapchat (I) + [All Instagram is Snapchat (A) → Conversion] → Some Snapchat is Instagram (I) → No conclusion. Hence conclusion II does not follow. All Instagram is Snapchat (A) → Conversion → Some Snapchat is Instagram (I) + No Instagram is Twitter (E) → Some Snapchat is not Twitter (O). Hence conclusion III does not follow.
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