if they are always there if i need them.,
You create a theory. Prove the theory to be true by testing it. If it works, it is true. If it does not work, it is not true.
What do you mean prove that they are true? There's no true or false - they are simply there in the sky, imaginary figures.
Prove that if it were true then there must be a contradiction.
you can't, but you can't prove a negative either.
To prove a statement false, you need ONE example of when it is not true.To prove it true, you need to show it is ALWAYS true.
Manjiro had to eat with chopsticks to prove they were Japanese.
if it's true
Yes
It is rare and difficult to prove a hypothesis true or false through experimentation. While it is typically easy to prove something completely false, proving it true is another story.
There are no real ways to prove you are not gay, as some gays are in 'the closet' and do sleep with woman. It shouldn't really matter what people think, and if it's your friends you shouldn't need to prove you're not. If they're making you prove it they're not good friends.
True.
true