negation
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.
Truth value
The statement "if not p, then not q" always has the same truth value as the conditional "if p, then q." They are logically equivalent.
science
conditional and contrapositive + converse and inverse
conditional and contrapositive + converse and inverse
conditional and contrapositive + converse and inverse
conditional and contrapositive + converse and inverse
true
Sojourner of Truth
.....
All these change over time. So the truth about all above is "Change".