# 3.2 What Is An Inductive Argument?

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• 1.

### An invalid argument is one with the following property: if the premises are all true, the conclusion can still be false.

• A.

True

• B.

False

A. True
Explanation
True, by definition.

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• 2.

### A strong argument is one with the following property: if all the premises are true, the conclusion is very likely true.

• A.

True

• B.

False

A. True
Explanation
True, again, by definition.

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• 3.

### An inductive argument is an argument that is intended to be strong.

• A.

True

• B.

False

A. True
Explanation
An inductive argument is an argument that is intended to provide strong evidence or support for its conclusion. Unlike deductive arguments, which aim to provide conclusive proof, inductive arguments rely on reasoning from specific observations or examples to make a general conclusion. Therefore, it is correct to say that an inductive argument is intended to be strong, as it aims to provide a high degree of probability or likelihood for its conclusion based on the evidence presented.

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• 4.

### An argument can be both strong and weak.

• A.

True

• B.

False

B. False
Explanation
False. This is contradictory. If it's weak then it's not strong, and vice versa.

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• 5.

### An argument can be both inductive and weak.

• A.

True

• B.

False

A. True
Explanation
True. This is the analog of the case where an argument is both deductive and invalid.

In this case, it's inductive if it's INTENDED to be strong. But that doesn't mean the argument actually IS strong. Lot's of people mistake weak arguments for strong ones.

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• 6.

### “Look, almost all spiders are poisonous, right?  You got bit by a spider, so you’ve very likely been poisoned!”

• A.

A strong inductive argument

• B.

A weak inductive argument

A. A strong inductive argument
Explanation
This has the form of a strong argument (if the premises are true, the conclusion is very likely true), and it's clearly intended to be strong, so it's inductive as well.

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• 7.

### “Look, some spiders are poisonous, right? You got bit by a spider, so you’ve very likely been poisoned!”

• A.

A strong inductive argument

• B.

A weak inductive argument

B. A weak inductive argument
Explanation
This is a weak inductive argument. "Some spiders" doesn't make it likely that the conclusion is true. In logic, "some" just means "at least one".

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• Current Version
• Mar 18, 2023
Quiz Edited by
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• Aug 25, 2012
Quiz Created by
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