The Lewis Carroll problem of grocers and bicyclists: 1. All honest men are healthy. 2. No grocers are healthy. 3. All industrious grocers are honest. 4. All cyclists are industrious. 5. All unhealthy cyclists are dishonest. What is the correct deduction?
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An excerpt from Pierce, John R. ๐๐ฏ ๐๐ฏ๐ต๐ณ๐ฐ๐ฅ๐ถ๐ค๐ต๐ช๐ฐ๐ฏ ๐๐ฐ ๐๐ฏ๐ง๐ฐ๐ณ๐ฎ๐ข๐ต๐ช๐ฐ๐ฏ ๐๐ฉ๐ฆ๐ฐ๐ณ๐บ. Dover Publications, 1980.
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