Assume the statements are true.
Statements: Some tulips are orchids. Some orchids are irises.
Conclusions:
I. All tulips are irises.
II. No tulip is an iris.

Only II followsCorrect answerYour answerEither I or II followsCorrect answerYour answerNeither I nor II followsCorrect answerYour answerBoth I and II followCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Two 'Some' statements give no definite link between tulips and irises, so neither I nor II follows alone.
'All' and 'No' are not a complementary pair: the picture where some tulips are irises and some are not makes both I and II false.
Since it is possible for both to be false, 'either I or II' is not guaranteed.
Neither I nor II follows.

Worth noting

All/No is not an either-or pair because both can be false at once: if some tulips are irises and some are not, neither 'All tulips are irises' nor 'No tulip is an iris' is true. The complementary pairs are Some/No and All/Some-not.

Concept: All / No is not an either-or pair
Typical timeTypical: 110 s
Your timeYours: —

The rule this testsPossibility and either-or

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Ten questions from Syllogisms, at your own pace.

Assume the statements are true.Statements: Some tulips are orchids. Some orchids are irises.Conclusions:I. All tulips are irises.II. No tulip is an iris.

Explanation

Assume the statements are true.
Statements: Some tulips are orchids. Some orchids are irises.
Conclusions:
I. All tulips are irises.
II. No tulip is an iris.