Friday, May 6, 2011

Negation, Denial of Statement

Negation of a statement is a denial statement. Negation is represented using the symbol ~. Negation is often formed by adding the word 'no' in a sentence of origin. Examples are given the sentence "p: rainy day ', its negation is" ~ p: no rain today. " If the original sentence is true, its negation is false, and vice versa. Sentence truth value of negation is always contrary to the truth value of sentence of origin. Because the truth of a negation depends on the original sentence, the negation of a sentence kalmat classified as compound.

EXAMPLE
Write the sentence that represents the negation of each of the following sentences: a. Legislative candidate from Golkar Party, b. Legislative candidate was not from the Golkar Party. c. Several candidates from the Golkar party, d. All the candidates come from the democrat party, e. None of the party's legislative Hanura.

COMPLETION
a. Negation of 'legislative candidates from the Golkar Party' is 'is not a legislative candidate from Golkar Party'.
b. Negation of 'it is not a legislative candidate from Golkar Party' is 'legislative candidates from the Golkar Party'.
c. Errors often arise when asked the negation of 'a few candidates from the Golkar Party'. Many who answered 'some candidates did not come from the Golkar Party'. The statement did not reject the initial statement. The expression 'a few candidates from the Golkar Party' implies there is at least one candidate from the Golkar Party. Statements that deny this, of course, 'There are no candidates from the Golkar Party'. The statement is a negation of the initial statement.
d. Negation of 'all the candidates from the Golkar Party' is 'there is at least one candidate who did not come from the Golkar Party,' or phrase that is often used 'some candidates did not come from the Golkar Party'.
e. Negation 'No legislature of Hanura' is 'there is at least one person from the party's legislative Hanura'. When more than one interpretation at least, we can use another negation of 'some of the party's legislative Hanura.

Said some, all, and no known as quantifier, kuantor. Statement in c through e involve kuantor in it. Negation of 'all p is q' is 'some p not q'. And vice versa. And the negation 'some p is q' is 'does not exist p is q'.

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