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True on Tuesday

Logic Level 2

If it's Tuesday, then this sentence is true.

Suppose it's Wednesday; is the sentence above true?

Yes No Undetermined

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

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including olympiad champions, researchers, and professionals.

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by Jason Dyer

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