Residue Reasoning

Description

Prove something by showing that all other possibilities are not possible.

This can be done with drama, striking off the alternatives from a figurative list. Then emphasize that the remaining option must be true.

In more detail, you can start with the problem, highlighting the issue. Then do analysis that shows the causes of the problem and so lead to options and disproving all except your chosen alternative. A way of doing this is through Pros-vs-Cons Reasoning.

Discussion

Sir Arthur Conan-Doyle's famous detective Sherlock Holmes said 'When you have eliminated the impossible, whatever remains, however improbable, must be the truth.' This classically summarizes the principle of residue reasoning.

This approach assumes of course that the speaker's list of options is a complete set of options. If an opponent shows further possibilities, then the argument (and perhaps the arguer) is destroyed.

If residue reasoning does not reach a final conclusion, then at least it may reduce the number of options, such that you can then compare the remaining possibilities using another form or reasoning.

Quick links

Residue Reasoning

Description

Example

Discussion

See also

Site Menu

You can buy books here

Quick links

Disciplines

Techniques

Principles

Explanations

Theories

And

Site Menu

Quick links

Disciplines

Techniques

Principles

Explanations

Theories

And