When a conditional statement is true and the hypothesis is also true, it means that the conclusion must logically follow from the hypothesis. In logical terms, this can be referred to as a valid implication, where the truth of the hypothesis guarantees the truth of the conclusion. If the conditional statement is in the form "If P, then Q," and we know that P is true, we can conclude that Q is also true. This relationship underscores the foundational principles of deductive reasoning in logic.
by switching the truth values of the hypothesis and conclusion, it is called the contrapositive of the original statement. The contrapositive of a true conditional statement will also be true, while the contrapositive of a false conditional statement will also be false.
Hypothesis followed by a conclusion is called an If-then statement or a conditional statement.
A conditional statement with a disjunction in the hypothesis takes the form "If A or B, then C," where A and B are separate propositions. For example, "If it is raining or it is snowing, then the ground will be wet." This means that if either A (raining) or B (snowing) is true, then C (the ground will be wet) must also be true.
Contrapositive
Switching the hypothesis and conclusion of a conditional statement.
the .... of a conditional statement is found by switching the hypothesis and conclusion .
by switching the truth values of the hypothesis and conclusion, it is called the contrapositive of the original statement. The contrapositive of a true conditional statement will also be true, while the contrapositive of a false conditional statement will also be false.
The inverse of a conditional statement switches the hypothesis and conclusion. The converse of a conditional statement switches the hypothesis and conclusion. The contrapositive of a conditional statement switches and negates the hypothesis and conclusion.
Negating the hypothesis and conclusion of a conditional statement forms the contrapositive of that statement. If the original conditional is "If P, then Q" (symbolically, P → Q), the contrapositive is "If not Q, then not P" (¬Q → ¬P). Importantly, a conditional statement and its contrapositive are logically equivalent, meaning they are either both true or both false.
Hypothesis followed by a conclusion is called an If-then statement or a conditional statement.
In the conditional statement "If the dress is yellow, then Alan likes the dress," the hypothesis is "the dress is yellow." This part of the statement sets the condition under which the conclusion (that Alan likes the dress) is assessed. If the hypothesis is true, then the conclusion is expected to follow, but if the hypothesis is false, the truth of the conclusion is not determined by this statement alone.
A conditional statement with a disjunction in the hypothesis takes the form "If A or B, then C," where A and B are separate propositions. For example, "If it is raining or it is snowing, then the ground will be wet." This means that if either A (raining) or B (snowing) is true, then C (the ground will be wet) must also be true.
the hypothesis
If a conditional statement is true then its contra-positive is also true.
The converse of this conditional statement would be: if I am in the south, then I am in Mississippi. It essentially swaps the hypothesis and conclusion of the original conditional statement.
Converse
Contrapositive