*Mathematical proof* is the heart of mathematics. It is what differentiates mathematics from other sciences. In mathematical proofs, we can show that a statement is true for all possible cases without showing all the cases. We can be certain that the sum of two even numbers is even without adding all the possible pairs.

For the liberal arts majors, the proofs below will be of great help to you, but I think the math majors are going to appreciate them more.

1.) Proof by Obviousness

*Example: “The proof is so clear that it need not to be mentioned.”*

2.) Proof by Intimidation

*Example 1: “Don’t be stupid. It’s true.”*

*Example 2: “It’s trivial”*

3.) Proof by Deception

*Example: “Now everyone turn their backs…”*

4.) Proof by Lack of Sufficient Time

*Example: ”Because of the time constraint, I’ll leave the proof to you.”*

5.) Proof by Plagiarism

*Example: “As we see on page 85, it is true.”*

6.) Proof by Intuition

*Example: “I have this gut feeling that it’s true.”*

7.) Proof by Calculus

*Example: “The proof requires calculus, so it must be true.”*

8.) Proof by Convenience

*Example: “Well, it would be nice if it were true.”*

9.) Proof by Authority

*Example: “Isaac Newton said it, so it must be true.”*

10.) Proof by Profanity

*This is a general patronage blog, so I cannot show the example here. *

11.) Proof by Terror

*Example cannot be shown. This proof is very effective if “Proof by Intimidation” fails.*

Note: This is a repost of 11 Proof Techniques Non-Math People Should Know.

Reference: 36 Humorous Methods of Proofs