No mammals lay eggs. All whales are mammals. Therefore, no whales lay eggs. Is t

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Question: No mammals lay eggs. All whales are mammals. Therefore, no whales lay eggs. Is this conclusion valid? (2023)

Options:

Correct Answer: Yes

Exam Year: 2023

Solution:

The conclusion is valid. Since all whales are mammals and no mammals lay eggs, it follows that no whales lay eggs.

No mammals lay eggs. All whales are mammals. Therefore, no whales lay eggs. Is this conclusion valid? (2023)

No mammals lay eggs. All whales are mammals. Therefore, no whales lay eggs. Is this conclusion valid? (2023)

Step 1: Understand that the statement 'No mammals lay eggs' means that if something is a mammal, it cannot lay eggs.
Step 2: Recognize that the statement 'All whales are mammals' means that every whale belongs to the group of mammals.
Step 3: Combine the two statements: Since all whales are mammals and no mammals lay eggs, it logically follows that whales cannot lay eggs.
Step 4: Conclude that the statement 'No whales lay eggs' is valid based on the previous steps.

Logical Deduction – The ability to draw conclusions based on given premises.
Categorical Logic – Understanding relationships between categories (e.g., mammals and whales) and their properties.