Is it acceptable to use "not polite" instead of "impolite"?
And generally speaking about other words in their negative form? By adding a prefix only? Can I use "not + the positive form" instead?
It's incorrect. > It's not correct.
It's impossible > It's not possible.
It's irreversible > It's not reversible
It's unbelievable > It's not believable.
It's imperfect > It's not perfect.
Are both sentences valid or acceptable?