Earlier quoted context omitted.
"Grandma went to heaven" is not falsifiable. I'd prefer keeping this discussion focused on falsifiable lies. Let those of us who believe in the resurrection of Jesus, the coming of the semantic web, or other supernatural phenomena believe what we want to believe.
When something is falsifiable, that means it is suitable for examination by science. When something is not falsifiable it should be considered false, in most contexts.
Ultimately, nothing is falsifiable because you have to make certain assumptions just to function.To truly throw out all assumptions would be to embrace solipsism. All that are left are various arbitrary criteria for belief.