Assume the statements are true.
Statements: All saws are drills. Some drills are not planes.
Conclusions:
I. All saws are planes.
II. Some saws are not planes.

Only I followsCorrect answerYour answerOnly II followsCorrect answerYour answerEither I or II followsCorrect answerYour answerNeither I nor II followsCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

The drills that are not planes may be outside the saws, so every saw could be a plane: II is not definite.
They may also include saws, so some saws could be not planes: I is not definite.
I and II have the same subject (saws) and predicate (planes), and All / Some-not are opposites, so exactly one is true in every picture.
Either I or II follows.

Worth noting

The All / Some-not pair is as complementary as Some / No, but only with the same subject and the same predicate.

Concept: The All / Some-not either-or pair
Typical timeTypical: 70 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: All saws are drills. Some drills are not planes.Conclusions:I. All saws are planes.II. Some saws are not planes.

Explanation

Assume the statements are true.
Statements: All saws are drills. Some drills are not planes.
Conclusions:
I. All saws are planes.
II. Some saws are not planes.