11 lines
451 B
Markdown
11 lines
451 B
Markdown
|
---
|
||
|
|
tags:
|
||
|
|
- Logic
|
||
|
|
- propositional-logic
|
||
|
|
- derivation-rules
|
||
|
|
---
|
||
|
|
|
||
|
|
This is also known as *proof by contradiction*. You start with an assumption declared in a subproof. If you can derive a contradiction from this assumption (typically from the introduction of another proposition and its negation), then you are permitted to derive the negation of the auxiliary assumption in the main proof.
|
||
|
|
|
||
|
|
[]()
|