Since it’s widely accepted that the word “literally” can be used to add emphasis, we need another word that can be used when you want to make it clear that you really mean “literally” in the original sense.
Since it’s widely accepted that the word “literally” can be used to add emphasis, we need another word that can be used when you want to make it clear that you really mean “literally” in the original sense.
Hmmm… when you say “academic” do you mean the Academy of ancient Greece? Because I’m guessing that’s around when that mix-up first happened.
Now that I think about it I’m less sure that it was such a mistake. A rational number is one that can be expressed as a fraction, so the full number is expressible (vs irrational numbers which can only be approximated or represented as symbols, like PI. I think). If an idea is “rational”, then the whole idea (all the antecedents and the conclusion) is expressible in a logical system, whereas an “irrational” idea can’t be expressed as a logical structure. I think “rational” as a shorthand for “has a finite logical definition” is pretty reasonable.
I just looked it up, and according to wikipedia I have it backwards, the number groups were named “rational” and “irrational” according to whether they were sayable or unsayable, which makes sense. Though one of the references in that section is just to… a guy on stackexchange paraphrasing what he read in the OED, so not sure I’m buying that page 100%. More research is needed.