Lecture 8 - Reason Decision Making Flashcards
(41 cards)
What is reasoning?
The action of thinking about something in a logical (or rational) way to make a decision
It involves using existing knowledge to draw conclusions, make predictions, or construct explanations.
What is inductive reasoning?
Making broad generalisations from specific observations
It is not certain because future observations may not confirm the generalisation.
What is deductive reasoning?
Reaching a specific, logical conclusion from general statements or hypotheses.
How is deductive reasoning typically structured?
- First premise (P1)
- Second premise (P2)
- Inference (or conclusion)
What is the goal of deductive reasoning?
To solve the reasoning task, although the solution isn’t always obvious.
Provide an example of deductive reasoning.
If Jude is taller than Jared (P1) and Jared is taller than Jesse (P2), then Jude is taller than Jesse (conclusion).
What are the two types of deductive reasoning?
- Conditional
- Syllogistic
What is conditional reasoning?
Reasoning with premises that include logical operators such as ‘if’, ‘or’, ‘and’.
What is an example of modus ponens?
If the weather is nice, David takes a walk. The weather is nice. Therefore, David takes a walk.
What is modus tollens?
If the weather is nice, David takes a walk. David does not take a walk. Therefore, the weather is not nice.
What is the conclusion validity of modus ponens and modus tollens?
Both conclusions are valid.
What is the affirmation of the consequent?
If David is angry (antecedent), then Eden is upset (consequent). Eden is upset. Therefore, David is angry.
Is the affirmation of the consequent valid or invalid?
INVALID
This argument commits the fallacy of affirming the consequent.
What is the denial of the antecedent?
If David is angry (antecedent), then Eden is upset (consequent). David is not angry. Therefore, Eden is not upset.
Is the denial of the antecedent valid or invalid?
INVALID
This argument commits the fallacy of denying the antecedent.
What are the four types of conditional reasoning problems?
- Modus ponens
- Modus tollens
- Affirmation of the consequent
- Denial of the antecedent
What is the difference between deductive reasoning and informal reasoning?
Deductive reasoning is uninterested reasoning, while informal reasoning involves personal goals and prior knowledge.
What are the two influential theories of deductive reasoning?
- Mental model
- Dual-systems
What is a mental model in reasoning?
Creating a visual image of the problem to determine validity.
What is a limitation of mental models?
It does not describe how we decide which information to include in the mental model.
What does dual-systems theory entail?
- Heuristic process
- Analytical process
What is informal reasoning?
The process of everyday reasoning, based on knowledge and experience, contrasting with formal logic.
What factors influence perceived strength of a conclusion in informal reasoning?
- Degree of previous conviction or belief
- Positive arguments have more impact than negative arguments
- Strength of the evidence
What is belief bias?
Accepting invalid conclusions if they are believable and rejecting valid conclusions if they are unbelievable.