conditional and contrapositive
+
converse and inverse
conditional and contrapositive + converse and inverse
conditional and contrapositive + converse and inverse
conditional and contrapositive + converse and inverse
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.
true
Not always. For example, X is equal to or less than 6 is not the same as X is equivalent to 6.
Statements A and B contain variables, as they do not specify a numerical value, and could be different in different circumstances. However, 80 mph and 27 points are constants that always have the same value.
They are the same. the absolute value is always positive
If I said "I always lie" and it's true, then I have spoken the truth and I don't always lie.By the same token if I say "I always lie" and it's a lie, then I say the truth sometimes.The man lies when he says he always lies.
Nothing. The truth is, they have always been different.
Yes, it is.
No, for silver coins as the value of silver changes the value of the coin changes. The same is true for gold coins.