I forget English is not your primary language.
Definition of unbelievable
of such a superlative degree as to be hard to believe
the destruction was unbelievablemade an unbelievable catch in center field
Dictionary by Merriam-Webster: America's most-trusted online dictionary
I hope that addresses your concern as well, @Two Wings . I used a synonym for "hard to believe". I was not altering the meaning, but also was not quoting you.
OK.
Seems a little slippery when wet.
... that means ... seems like a dodge, fortunate in finding a reference equating a term and a phrase. While that may be true, it’s imprecise. clearly “hard to believe” isn’t literally “unbelievable” nor vv.
and in that post you’d presumed for another ... so either challenging outright based upon your own understanding of the topic or just being a jack wagon.
So it wasn’t clear to me you were seeking to use the same meaning in degree as further presuming the degree in your strawman.