proposition, types and difference between proposition and sentence

very nice and complete presentation on the subject of logic and critical thinking

1. Name: Zain ullah Class Roll# 38 Program: M.com semester 1st Department: Quaid -e- Azam college of commerce,UOP

2. Main points of Presentation: What is proposition Types of proposition Difference between proposition and sentence Conclusion Question/answer session

3. Proposition Definition : A proposition is a statement that can be either true or false; It must be one or the other, it can not be both. Key point of definition: If a proposition is true then we say it is “ Truth value ” is “True ” and if a proposition false, then we say its truth value is “False ” Example: Mian Muhammad Nawaz Sharif is the current prime minister of Pakistan. if he is then it is true if he is not then its truth value will be false

4. O ther definition: Proposition……. Any statement that can be asserted or denied. (i.e. said to be true or false ) Example Belgium is a country in Europe The above statement is true And if we say as, Egypt is a country in Europe. This statement is false. Proposition is a declarative/informative sentence.

5. Kinds of proposition: Simple proposition Complex Proposition Simple proposition: A proposition that does not contain any other proposition as a component part. Simple propositions are independent. Simple propositions are those propositions that give us information about a single fact. Example: Fast food tends to be unhealthy. Afghanistan is in Asia.

6. Complex proposition: A proposition that contains another proposition as a component. It is dependent. Proposition which contains two or more simple proposition. A proposition that gives us information about more than one fact. Example : If fast food tend to be unhealthy, then you should not eat it. Afghanistan is a country in Asia and Kabul is its capital.

7. Proposition is different from Sentence!!! HOW….

8. There is always a difference between a proposition and sentence. There are some types of sentences that can not be a proposition. They are as follows; Imperative sentence: It can not be a proposition because it is not a declarative sentence. example. clean your room. close your books. Interrogative sentence: It is not a proposition because it is not a declarative sentence. example. What is your name? where do u live?

9. A proposition is a statement that is capable of determining whether a statement is true or false. And it is a statement which gives us information about fact. Keeping view all the above points we can say that “every proposition can be a sentence but every sentence can not be a proposition”