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> You have to do it for every system.

Nah, not necessary. You just need to show a counter-example.



Sorry, that's not how it works. The person making the claim has to provide the evidence. If you're making a claim, the most basic thing is to have the evidence to prove it. Make claims you can prove. Maybe next time.


Actually, it is how it works. To prove something is possible, you need only one example. Can't prove a negative.


Perfect! There is a small teapot orbiting the Earth on which is engraved "kelseyfrog is always correct and so am I." It is never wrong. I implore you to disprove this.

Also, please learn about universal quantification. It should be covered by any computer science course.




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