Want a beer?

Logic Level 1

Three expert logicians - Expert A, Expert B and Expert C - walk into a bar. The bartender asks if all three would like a beer. All three of them answer one after another. The following statements do not necessarily follow the order in which they answered the bartender:

Expert A said "I don't know".

Expert B said "Yes".

Expert C said "I don't know".

Assume that: The logicians do not change their minds after answering. Each logician does not know if the other logicians would like a beer when the bartender asks them. The logicians answer the bartender without communicating amongst themselves who wants a beer.

Which of the following statements is always true?

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 8 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.