Theoretically, you can always prove that something exists by showing it. But that's also why you can never definitively prove that something doesn't exist.
- The Earth revolves around the Sun. The Sun revolves around the Earth. Both are true. It's all about where to place the origin of the coordinate system.
Linguistic meme. The Minister of Finance is asked:
- How are things in our country with finances? (This has a double meaning - either the country is doing well with the budget, state finances. Or it is good to live in the country with money, when there is money)
- With finances - it is good. Without finances it is bad (Here is a deliberate deceit - the answer chosen is to live well when there is money)