See the truth table forSo you can derive a true conclusion from false premises?
If A is false, then B can be either false or true, the proposition " " will always be true.
In order to prove the property, you can just use the property of addition of natural numbers :
If a and b are natural numbers, then a+b is also a natural number.
Hence 1+1 is a natural number. And 1+1>1. Thus the statement is false