a conditional and its contrapositive
Contrapositive
This is not always true.
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.
You can logically conclude that those two phenomena always coincide precisely.
No.
It is always important to think logically and not allow emotion to lead to a poor decision.
no they are not always equivalent.
a boy who always thinks logically
One statement about gravity that is always true is that it is a force of attraction between objects with mass.
always true
always true
A Tautology is any logical statement that always results in True. Example, the statement - "Malaria is dangerous" is always true.A Fallacy is a statement that always results in False. Example - "Toxic waste is easy to store" - is always falseThere are exactly opposite of each other.