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Supplementary Notes

Deductive Reasoning

Matthew 19:16-17 - Agathos

Greek Word Studies - Advanced Level

The Rich Young Ruler approached Jesus using the word good (Greek agathos). Jesus was the Master Teacher. Jesus used deductive reasoning to teach the rich young ruler.

What is DEDUCTIVE REASONING?

Deductive reasoning works like this:

Proposition: All a's are b's

c is an a

Conclusion: c is a b

Example:

Proposition: All cats like milk

Felix is a cat

Conclusion: Felix likes milk

Jesus used deductive reasoning with the Rich Young Ruler.

First of all Jesus drew the man's attention to what he had said.

The logic of his words could only leave one conclusion - that Jesus is God.

"Good (agathos) Master"

"Why do you call ME good? There is none good but God."

Proposition: There is none good but God

Jesus is good

Conclusion: Jesus is God

If the proposition is true - then the conclusion must always be true.

But if the proposition is wrong then the conclusion will be wrong.

Example of a wrong proposition leading to a wrong conclusion is the theory of human evolution.

Proposition: All species of animals evolved from lower life forms

Humans are a species of animal

Conclusion: Humans evolved from a lower life form

The conclusion is wrong because the proposition is wrong.

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