Module 8B Flashcards
Understanding Consistency analogies
Argues that because an analogue subject deserves a certain conclusion, a similar primary subject also deserves that conclusion.
Refutation by Logical Analogy:
Type of consistency analogy where subjects are arguments, concluding that the primary subject argument is bad.
Structure of Consistency Analogies: 4
(1) Analogue subject has features a, b, c.
(2) Because the analogous subject has features a, b, c, it is properly judged to be W.
(3) The primary subject has features a, b, c (or similar features).
(C) The primary subject is properly judged to be W.
Critiquing Consistency Analogies: 6
(I) Irrelevant Features:
Features of analogue subject not relevant to its judgment.
(II) Faulty Analogy:
Features of primary subject not similar to features of analogue subject.
(III) Missing Features:
Primary subject lacking features it is claimed to have.
(IV) Important Differences:
Primary subject has other features making it different from analogue subject.
(V) Inconsistent Conclusions:
Conclusion about primary subject doesn’t correspond to conclusion about analogue subject.
(VI) Counter-Analogy:
A counter-analogy exists, showing weakness in the original analogy.
understanding Inductive Analogies:
Argues that because something happened to analogue case/s, the same/similar thing will happen in a primary case.
A type of consistency analogy where the conclusion is about something happening to the primary subject.
Structure of Inductive Analogies: 3
(1) Analogue subject/s A with features F has been observed to have J happen.
(2) Primary subject P with feature F (or similar feature F) will also have J (or J) happen.
(C) Conclusion: Primary subject P will have J (or J*) happen.
Evaluating Inductive Analogies:
(I)-(VI) Similar to Critiquing Consistency Analogies.
***(VII) Actuality of Analogue Subjects:
Analogue subjects in inductive analogies need to be actual or easily realized.
***(VIII) Number and Variety of Analogue Subjects:
The number and variety of analogue subjects are important for confidence in predicting the same outcome in the primary subject.
Analogical Fallacies: 4
- Faulty/Superficial Analogies:
Similarities not related to the conclusion. - Two Wrongs Make a Right:
Accepting something wrong because a similar wrong was unpunished. - Slippery Assimilation:
Assuming all cases can be assimilated because they can be arranged in a series with small differences. - Slippery Precedent:
Acting in a way legitimate in one context can set a precedent for illegitimate actions in other contexts.
Inductive Arguments:
- Arguing from experienced to a conclusion about what hasn’t been experienced.
- Includes inductive analogies, singular inductions, inductive generalizations, explanatory inductions.
Singular Inductions:
1.Arguing from experience of similar situations to a conclusion about a different single occasion.
- Differs from inductive analogies as it doesn’t refer to shared features between observed and unobserved cases.
Inductive Generalizations:
Drawing conclusions about a whole class based on a sample.
Explanatory Inductions:
Arguing from observations to the best explanation, often involving causal explanations.
A type of inductive argument.
General form: (1) Range of facts (a), (b), (c)…; (2) A good explanation of these facts is…; (3) No rival hypothesis provides as good an explanation; (C) Our explanation is correct.
Perfectly Representative Sample:
- essential definition
- operational/criterial definition
Essential definition: The percentage of items in the sample with a certain characteristic is the same as the percentage in the total population.
Criterial/Operational Definition: When all members of the sample are randomly selected or selected using a suitable sampling procedure.
Correlations and Causation:
- Positive Correlation: Higher proportion of A’s than non-A’s are B’s.
- Negative Correlation: Smaller proportion of A’s than non-A’s are B’s.
- No Correlation: Same proportion of A’s as non-A’s are B’s.
- Inferring from correlation to causation requires excluding other possibilities.
Fallacies in Correlations: 3
- Hasty Generalizations:
Drawing conclusions based on too little inductive evidence. - Post Hoc Fallacy:
Concluding A causes B simply because A occurred before B. - Objectionable Cause:
Drawing causal conclusions from correlation without ruling out other possibilities.
Conducive Arguments:
Arguments with multiple inferences providing independent, often weak, support for the conclusion.
Convergent support contributes to cogency.
When are Inductive analogies used?
- Commonly used in scientific and technological contexts.
- Crucial in ordinary contexts like sailing, firefighting, woodworking, poker, nursing, gardening, farming, warfare, etc.
Structure of Inductive Arguments from Experience: 3
- I have experienced objects A1, A2, A3… with feature F to also have feature J.
- P has feature F (or similar feature F*).
- P also has feature J (or J*).