Metals: Conductivity Rule
The question starts with a general statement about metals:
- Premise 1: All metals are good conductors of electricity. This means that if something is a metal, it definitely has the property of conducting electricity well.
Copper: Metal Status
Next, the question provides specific information about copper:
- Premise 2: Copper is a metal. This places copper into the category defined in the first premise.
Conclusion: Copper's Conductivity
Now, we need to combine these two pieces of information to find the logical conclusion.
Since all metals are good conductors (Premise 1), and copper is confirmed to be a metal (Premise 2), we can apply the general rule to the specific case of copper.
Therefore, the conclusion that logically follows is that copper must also be a good conductor of electricity.
Let's look at the options provided:
- Option 1: Copper is not a conductor - This is incorrect because copper is a metal, and all metals are conductors.
- Option 2: Copper is a metal only - This statement might be true in other contexts, but it doesn't follow logically from the given premises regarding conductivity.
- Option 3: Copper is a poor conductor - This contradicts the first premise, which states all metals are *good* conductors.
- Option 4: Copper is a good conductor - This is the correct conclusion derived directly from applying the general rule (all metals are good conductors) to the specific instance (copper is a metal).
The logical deduction is straightforward: If a group (metals) has a specific characteristic (being good conductors), and an individual item (copper) belongs to that group, then the individual item must also possess that characteristic.
Important Questions from Syllogism
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All dancers are talented.
Some girls are dancers.
Conclusions:
I. Some girls are talented.
II. All talented are girls.
III. All girls are talented.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All directors are actors.
No actor is a producer.
All choreographers are directors.
Conclusions:
I. No choreographer is producer.
II. Some actors are choreographers.
III. No director is a producer.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follows from the statements.
Statements:
All lemons are plums.
All plums are dates.
Some dates are mangoes.
Conclusions:
I. Some lemons are mangoes.
II. Some mangoes are plums.
III. All lemons are dates.
IV. Some mangoes are dates.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
Some cards are postcards.
Some cards are envelopes.
All envelopes are copies.
Conclusions:
I. Some copies are envelopes.
II. Some postcards are copies.
III. Some cards are copies.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All employees are tax-payers.
Some employees are farmers.
Some farmers are doctors.
Conclusions:
I. No farmer is a tax-payer.
II. Some farmers are tax-payers.
