Tutorial 2
Multiple-choice exercise
Choose the correct answer for each question.
Choose the best co-premise (helping premise) for this argument.
- 'In a vacuum, dust falls more slowly than on Earth.'
- 'Dust falls more quickly in a vacuum than it does on Earth.'
- 'The Moon's gravity is much less than the Earth's.'
- 'Gravity determines the speed with which dust falls.'
- 'The Earth has an atmosphere.'
- No co-premise is needed. This argument is fine as it is.
Choose the best co-premise for this argument.
- 'If there is no atmosphere then there is a vacuum.'
- 'The Earth has an atmosphere.'
- 'This shows a fundamental misunderstanding of the bizarre lunar environment.'
- No co-premise is needed. The argument is fine as it is.
- 'Dust is always in a vacuum.'
- 'The Moon needs an atmosphere.'
Choose the best co-premise (helping premise) for this argument.
- 'The Apollo astronauts did not use long film exposure.'
- 'The Apollo astronauts used long film exposure for their pictures.'
- 'The Apollo pictures were very faint.'
- 'The film exposure in the Apollo pictures was very faint.'
- No further co-premise is needed. The argument is fine as it is.
Choose the best co-premise for this argument.
- 'It is not possible to take pictures of the lunar surface and of stars at the same time.'
- 'The Apollo astronauts were trying to take pictures of the background.'
- 'Stars are very faint.'
- 'The lunar surface has stars in the background.'
- No further premises are necessary. This argument is clear as it is.
Choose the best co-premise for this argument.
- 'A thrust of 0.3 kilograms per square centimetre is not enough to create a blast crater.'
- 'Too weak for a crater.'
- 'A engine thrust would create a blast crater.'
- 'The 4,500 kilograms of thrust were spread across the area of the engine nozzle.'
- 'The engine nozzle was around 15,000 square centimetres.'
- No further premises are needed. This argument is fine as it is.
Choose the best co-premise for this argument.
- 'Flags only move in the wind.'
- 'Vibration could have moved the flag.'
- 'The scenes were filmed on Earth.'
- 'With no atmosphere to dampen the movement of the flag, the material would move for longer.'
- 'The lack of gravity on the moon would keep the flag moving.'
- No more premises are needed. This argument is fine as it is.
What, if anything, is wrong with this argument map?
- It violates the No Danglers Rule.
- What has been presented as a reason is in fact an objection.
- It violates the Golden Rule.
- There is nothing wrong with this argument map.
What, if anything, is wrong with this argument map?
- It violates the No Danglers rule.
- It violates the Golden Rule.
- What has been presented as a reason is in fact an objection.
- There is nothing wrong with this argument map.
What, if anything, is wrong with this argument map?
- It violates the No Danglers Rule.
- It violates the Golden Rule.
- What has been presented as a reason is in fact an objection.
- There is nothing wrong with this argument map.
What, if anything, is wrong with this argument map?
- There is only one premise in the reason.
- What is offered as a reason is in fact an objection.
- There is nothing wrong with this argument map.
- The reason and conclusion do not 'hold hands'.