The eternal truth of mathematics versus the constant evolution of other sciences!
While physics textbooks become outdated once Newton revolutionized mechanics, and chemistry texts are obsolete if they predate electron discovery, math books from literal millennia ago can still be perfectly valid today.
This highlights the fundamental difference between mathematical truths and scientific theories. The Pythagorean theorem hasn't changed since 500 BCE, but our understanding of the physical world gets completely rewritten every few centuries.
Next time someone questions why mathematicians seem so smug, remind them their work has a shelf life measured in eons rather than decades!
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