"The sense development has been extraordinary, even for an adj." [Weekley] -- from "timid" (pre-1300); to "fussy, fastidious" (c.1380); to "dainty, delicate" (c.1405); to "precise, careful" (1500s, preserved in such terms as a nice distinction and nice and early); to "agreeable, delightful" (1769); to "kind, thoughtful" (1830). In 16c.-17c. it is often difficult to determine exactly what is meant when a writer uses this word. By 1926, it was pronounced "too great a favorite with the ladies, who have charmed out of it all its individuality and converted it into a mere diffuser of vague and mild agreeableness." [Fowler]
"I am sure," cried Catherine, "I did not mean to say anything wrong; but it is a nice book, and why should I not call it so?" "Very true," said Henry, "and this is a very nice day, and we are taking a very nice walk; and you are two very nice young ladies. Oh! It is a very nice word indeed! It does for everything." [Jane Austen, "Northanger Abbey"]
"The right thing to do is to close Guantanamo. Why? Because no self-respecting country would operate such a place. Moving on to my next point, ..."
"Arminians are heretics."
"Why do you say that?"
"Because they don't believe what the Bible says, and that makes them heretics."
"He said Guantanamo should be closed, which begs the question: What do we do with all the prisoners?"