Uh what did you even read what I said? You’re not addressing anything I said. And you can’t just make up your own definition for a word that definitely has one. Quick search, Oxford dictionary says rational: based on or in accordance with reason or logic. Which being purely selfish absolutely is not for my previously mentioned reasons you’re ignoring. You can’t just redefine a word to suite your argument

Edit: this funny since you keep mentioning mathematics:

MATHEMATICS (of a number, quantity, or expression) expressible, or containing quantities that are expressible, as a ratio of whole numbers. When expressed as a decimal, a rational number has a finite or recurring expansion.