Is logic valid?

Author: SirAnonymous

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@SirAnonymous
I agree. It's just that I can't prove it's valid. Yes, it applies everywhere. Yes, it's self-evident. However, can you prove that it's self-evident or that it applies everywhere? We are forced to assume those things in order to make sense of the world, but even that assumes that the universe can be made sense of.
Try communicating without using the laws of logic. You can't make sense without using them. Words convey meaning and words convey identity. Something is either true or it is not true. It can't both be true and false at the same time and in the same manner. When I say the dog that does not mean the cat. A dog has a meaning and identity that we must understand to communicate effectively.