Formal logic
About the Lecture
The lecture Formal logic by Tim Aghotor is from the course Legal English (EN). It contains the following chapters:
- Introduction to Formal Logic
- Examples of Formal Logic
- Explanation of Contrapositive
- Sufficient Conditions and Necessary Requirements
- Summary
Included Quiz Questions
What is formal logic?
- Conditional statements
- If/then statements
- Interpretation of laws
- Negations of decisions
How do you form a contrapositive of any if/then statement?
- By reversing and negating the terms
- By reversing the terms
- By negating the terms
- None of these answers is right.
What do you have to keep in mind when forming the contrapositive of a formal logic statement which is already in the negative?
- The same rules that apply to maths apply to forming the contrapositive.
- Negating a negative yields a positive.
- Negative a negative yields a negative.
- It is not possible to form a contrapositive of a formal logic statement which is already in the negative.
Necessary conditions are usually signaled by the keyword ...
- ... only.
- ... and.
- ... or.
- ... if.
Author of lecture Formal logic
Tim Aghotor
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