Lies are temporary

If a claim is testable and cannot be shown to be false then we can presume that it is true. We can show the non-truth of a claim by finding a counter-example. Once we have found the counter-example then the original claim no longer stands. If we cannot find a counter-example then either the claim is true or it is untestable. We might speculate about what is on the far side of the moon but since it is not easy to go there and find out such claims are practically worthless and empty. If we are making a non-empty truth claim (a testable truth claim) then once we have made the claim and presented proof we can assume it is true and wait for a counter-example to be found. We do not prove the truth of something merely by showing that a different thing is false unless that thing is the opposite of the original claim. We can only prove A by showing that B is false if B is the opposite of A. If B is not the opposite of A then to establish the falseness of B has no bearing on A because there may be other factors. We can only show A by giving evidence and waiting for a counter-example. We have a (testable) law about nature if there are no counter-examples. If a testable (meaningful) claim has evidence to support it and no counter-examples then we can say that (for the time being) it is true and a law. If something cannot be falsified then it is true.