Monday, March 30, 2009

UNDERSTANDING STATEMENTS

UNDERSTANDING STATEMENTS


x + 2 is positive.
The above sentence is not a statement because it is true for some value of x and false for some values of x. We can say that the truth value of the statement is vague
2. May I come in?
The above sentence is permission and hence we can't talk about its truth values so it is also not a statement.
Logic is interesting.
Logic is interesting is a statement because logic is interesting and its truth value is T.
It is hot today.
It is hot today is also a statement because whenever we say this sentence then that day either hot or not so we can assign a truth value to this sentence.
5. -1 > 0 is also a statement with truth value F
x + y = 12 is not a statement.

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