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CBSA Border Services Officer Exam · Question

Consider the following statements: 1. All birds can fly. 2. Ostriches are birds. 3. Ostriches cannot fly. Which of the following logically follows from these statements? A) Statement 1 is false. B) Statement 2 is false. C) Statement 3 is false. D) All statements are true.

If all birds can fly, and ostriches are birds, then ostriches must fly. Since statement 3 says ostriches cannot fly, there is a contradiction, and statement 1 (

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Question: Consider the following statements:

  1. All birds can fly.
  2. Ostriches are birds.
  3. Ostriches cannot fly.

Which of the following logically follows from these statements?

A) Statement 1 is false. B) Statement 2 is false. C) Statement 3 is false. D) All statements are true.

Answer options: ✅ Statement 1 is false.

  • Statement 2 is false.
  • Statement 3 is false.
  • All statements are true.

Correct answer: Statement 1 is false.

Explanation: If all birds can fly, and ostriches are birds, then ostriches must fly. Since statement 3 says ostriches cannot fly, there is a contradiction, and statement 1 ('All birds can fly') must be false.

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