Statement: The Lakeview Housing Society asks residents to switch off the corridor lights after 11 p.m. to cut the society's electricity bill.
Assumptions:
I. The corridor lights are at present often left on after 11 p.m.
II. Switching off the corridor lights will lower the society's electricity bill.
Which assumptions are implicit?

Only I is implicitCorrect answerYour answerOnly II is implicitCorrect answerYour answerNeither I nor II is implicitCorrect answerYour answerBoth I and II are implicitCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

Negation test for I: if the corridor lights were already always off after 11 p.m., the request would be pointless. So I is implicit.
Negation test for II: if switching them off did not lower the bill, the stated purpose would fail. So II is implicit.
Both I and II are implicit.

Concept: Assumptions about the present and about the effect of a request
Typical timeTypical: 70 s
Your timeYours: —

The rule this testsStatements and assumptions

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Ten questions from Statements, Conclusions and Assumptions, at your own pace.

Explanation