Syllogisms hard
Below is a quiz with 21 of the hardest multiple-choice questions about syllogisms you will find on the web. Have fun!
| 1. | a. All hamburgers are meals. |
| b. Some cows are hamburgers . |
| All meals are cows | ||
| At least some meals are cows | ||
| No cows are meals | ||
| Some cows are no meals | ||
| 2. | a. All cities have houses . |
| b. All countries have cities . |
| All houses have countries | ||
| All countries have houses | ||
| Not all houses have countries | ||
| No valid conclusion possible | ||
| 3. | a. All kitchens have cabinets. |
| b. All cabinets have shelves . |
| At least some kitchens have shelves | ||
| All shelves have kitchens | ||
| All kitchens have shelves | ||
| No valid conclusion possible | ||
| 4. | a. All car drivers are environmental polluters. |
| b. All detergents are environmental polluters. |
| Some detergents are environmental polluters | ||
| All car drivers are detergents | ||
| No car driver is a detergent | ||
| No valid conclusion is possible | ||
| 5. | a. All dogs are brown. |
| b. All Bull Dogs are brown. |
| At least some dogs are Bull Dogs | ||
| Some dogs are Bull Dogs | ||
| All Bull Dogs are dogs | ||
| No valid conclusion possible | ||
| 6. | a. All books are reference books. |
| b. No reference books are encyclopedias. |
| No books are encyclopedias | ||
| All books are encyclopedias | ||
| No books are no encyclopedias | ||
| No valid conclusion possible | ||
| 7. | a. Some furniture have legs. |
| b. All legs have owners. |
| Some furniture have owners | ||
| All furniture have owners | ||
| At least some owners heft furniture | ||
| No valid conclusion possible | ||
| 8. | a. No trousers are clothing. |
| b. No sweaters are trousers. |
| Some sweaters are clothing | ||
| Some clothing are sweaters | ||
| All sweaters are clothing | ||
| No valid conclusion possible | ||
| 9. | a. Some rivers have currents. |
| b. Some ponds have currents. |
| Some rivers have ponds | ||
| Some ponds have rivers | ||
| No ponds have rivers | ||
| No valid conclusion possible | ||
| 10. | a. All trees are oxygen producers. |
| b. All trees are fire wood. |
| All oxygen producers are fire wood | ||
| At least some oxygen producers are fire wood | ||
| Some fire woods are oxygen producers | ||
| No valid conclusion possible | ||
| 11. | a. All kids are whiners. |
| b. Some kids are cry babies. |
| No whiners are cry babies | ||
| Not all whiners are cry babies | ||
| At least some whiners are cry babies | ||
| No valid conclusion possible | ||
| 12. | a. No horses are molluscs. |
| b. All crabs are horses. |
| No crabs are mollusc’s | ||
| Some horses are no crabs | ||
| No mollusc’s are horses | ||
| No valid conclusion possible | ||
| 13. | a. Some cars are four whealers. |
| b. All cars are three whealers. |
| No three wheelers are four wheelers | ||
| All four wheelers are three wheelers | ||
| At least some three wheelers are four wheelers | ||
| No valid conclusion possible | ||
| 14. | a. All wires are strings. |
| b. Some tubes are wires. |
| Some strings are tubes | ||
| Some tubes are strings | ||
| No strings are tubes | ||
| No valid conclusion possible | ||
| 15. | a. No computers are televisions. |
| b. All cathode ray tubes are televisions. |
| All cathode ray tubes are computers | ||
| No cathode ray tubes are computers | ||
| All computers are cathode ray tubes | ||
| No valid conclusion possible | ||
| 16. | a. Some AB is CD. |
| b. No CD is EF. |
| At least some AB is No EF | ||
| Some EF is AB | ||
| No AB is EF | ||
| No valid conclusion possible | ||
| 17. | a. All paths have rocks. |
| b. All areas have paths. |
| All rocks have areas | ||
| All areas have rocks | ||
| Not all rocks have areas | ||
| No valid conclusion possible | ||
| 18. | a. All schools are buildings. |
| b. Some schools are tents. |
| No buildings are tents | ||
| Not all buildings are tents | ||
| At least some buildings are tents | ||
| No valid conclusion possible | ||
| 19. | a. Some apartments have showers. |
| b. Some boats have showers. |
| Some apartments have boats | ||
| Some boats have apartments | ||
| No boats have apartments | ||
| No valid conclusion possible | ||
| 20. | a. All fungi are bacteria. |
| b. Some mushrooms are fungi. |
| All bacteria are mushrooms | ||
| At least some bacteria are mushrooms | ||
| No mushrooms are bacteria | ||
| Some mushrooms are no bacteria | ||
| 21. | a. No *** are ###. |
| b. Some ^^^^ are ###. |
| All ^^^^ are no *** | ||
| Some *** are no ^^^^ | ||
| At least some ^^^^ are no *** | ||
| No valid conclusion possible |
