The given conditional statement is, $ p\to \tilde{\ }q $ The contrapositive of this statement is, $ \tilde{\ }(\tilde{\ }q\to p)=\tilde{\ }(\tilde{\ }q)\to \tilde{\ }p $$ =q\to \tilde{\ }p $
A statement is a sentence that is either true or false, but not both true and false simultaneously.
Types of Statements:
Simple Statement
If a statement cannot be further broken down into various statements, or in simpler words if it is concrete by itself, it is called a Simple Statement.
Examples include:
A kite is not a rhombus.
15 is an odd number.
Compound Statement
If a statement can further be broken down into simpler statements so that from a main statement, we can yield more than one statement, then it is called a Compound Statement.
Consider the statement “10 is non-negative and a multiple of 5” which can be broken down into the statements: “10 is non-negative” and “10 is a multiple of 5”.
If-Then Statements
If we encounter an if-then statement i.e. ‘if a then b’, then by proving that a is true, b can be proved to be true or if we prove that b is false, then a is also false.
If we encounter a statement which says ‘a if and only if b’, then we can give reason for such a statement by showing that if a is true, then b is also true and if b is true, then a is also true.
Example:
a: 8 is multiple of 64
b: 8 is a factor of 64
Since one of the given statements i.e. a is true, therefore, a or b is true.