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In English, existence is usually connected with the verb "to be".
- I am a human.
- This is a pen.
- The sky is blue.
- Four plus three is seven.
The first sentence can be understood to say "I exist as a human", and simply speaking, this is probably true. The fourth sentence is more difficult to understand, because it can be understood to say "seven exists as the sum of four and three", but "seven" is not something that we can see or touch like a pen or a human.
- "A Treatise on Book Titles" is an old book written by Muhammad al-Amidi. It talks about existence and is written in Arabic.